Random old code for BCI.

author: matthew <matthew> 2006-09-19 15:08:36 +0000
committer: matthew <matthew> 2006-09-19 15:08:36 +0000
commit: 998534c14693435a79181acbbedd70a2ea7ec08d (patch)
tree: 395b48ebeddad620e55d918a17d7a9369ea52aa1 /web
parent: adf632f9b1476f4d8bdffe8cfb85d5e88685ff48 (diff)
23 files changed, 7705 insertions, 0 deletions
diff --git a/web/build/YAHOO.js b/web/build/YAHOO.js
new file mode 100644
index 000000000..33e3ff47d
--- /dev/null
+++ b/web/build/YAHOO.js
@@ -0,0 +1,63 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ * @class The Yahoo global namespace
+ */
+var YAHOO = function() {
+
+    return {
+
+        /**
+         * Yahoo presentation platform utils namespace
+         */
+        util: {},
+
+        /**
+         * Yahoo presentation platform widgets namespace
+         */
+        widget: {},
+
+        /**
+         * Yahoo presentation platform examples namespace
+         */
+        example: {},
+
+        /**
+         * Returns the namespace specified and creates it if it doesn't exist
+         *
+         * YAHOO.namespace("property.package");
+         * YAHOO.namespace("YAHOO.property.package");
+         *
+         * Either of the above would create YAHOO.property, then
+         * YAHOO.property.package
+         *
+         * @param  {String} sNameSpace String representation of the desired
+         *                             namespace
+         * @return {Object}            A reference to the namespace object
+         */
+        namespace: function( sNameSpace ) {
+
+            if (!sNameSpace || !sNameSpace.length) {
+                return null;
+            }
+
+            var levels = sNameSpace.split(".");
+
+            var currentNS = YAHOO;
+
+            // YAHOO is implied, so it is ignored if it is included
+            for (var i=(levels[0] == "YAHOO") ? 1 : 0; i<levels.length; ++i) {
+                currentNS[levels[i]] = currentNS[levels[i]] || {};
+                currentNS = currentNS[levels[i]];
+            }
+
+            return currentNS;
+
+        }
+    };
+
+} ();
+
diff --git a/web/build/animation.js b/web/build/animation.js
new file mode 100644
index 000000000..05c92eede
--- /dev/null
+++ b/web/build/animation.js
@@ -0,0 +1,907 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ *
+ * Base class for animated DOM objects.
+ * @class Base animation class that provides the interface for building animated effects.
+ * <p>Usage: var myAnim = new YAHOO.util.Anim(el, { width: { from: 10, to: 100 } }, 1, YAHOO.util.Easing.easeOut);</p>
+ * @requires YAHOO.util.AnimMgr
+ * @requires YAHOO.util.Easing
+ * @requires YAHOO.util.Dom
+ * @requires YAHOO.util.Event
+ * @constructor
+ * @param {HTMLElement | String} el Reference to the element that will be animated
+ * @param {Object} attributes The attribute(s) to be animated.
+ * Each attribute is an object with at minimum a "to" or "by" member defined.
+ * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
+ * All attribute names use camelCase.
+ * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
+ * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
+ */
+
+YAHOO.util.Anim = function(el, attributes, duration, method)
+{
+   if (el) {
+      this.init(el, attributes, duration, method);
+   }
+};
+
+YAHOO.util.Anim.prototype = {
+   /**
+    * Returns the value computed by the animation's "method".
+    * @param {String} attribute The name of the attribute.
+    * @param {Number} start The value this attribute should start from for this animation.
+    * @param {Number} end  The value this attribute should end at for this animation.
+    * @return {Number} The Value to be applied to the attribute.
+    */
+   doMethod: function(attribute, start, end) {
+      return this.method(this.currentFrame, start, end - start, this.totalFrames);
+   },
+
+   /**
+    * Applies a value to an attribute
+    * @param {String} attribute The name of the attribute.
+    * @param {Number} val The value to be applied to the attribute.
+    * @param {String} unit The unit ('px', '%', etc.) of the value.
+    */
+   setAttribute: function(attribute, val, unit) {
+      YAHOO.util.Dom.setStyle(this.getEl(), attribute, val + unit);
+   },
+
+   /**
+    * Returns current value of the attribute.
+    * @param {String} attribute The name of the attribute.
+    * @return {Number} val The current value of the attribute.
+    */
+   getAttribute: function(attribute) {
+      return parseFloat( YAHOO.util.Dom.getStyle(this.getEl(), attribute));
+   },
+
+   /**
+    * Per attribute units that should be used by default.
+    * @type {Object}
+    */
+   defaultUnits: {
+      opacity: ' '
+   },
+
+   /**
+    * The default unit to use for all attributes if not defined per attribute.
+    * @type {String}
+    */
+   defaultUnit: 'px',
+
+   /**
+    * @param {HTMLElement | String} el Reference to the element that will be animated
+    * @param {Object} attributes The attribute(s) to be animated.
+    * Each attribute is an object with at minimum a "to" or "by" member defined.
+    * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
+    * All attribute names use camelCase.
+    * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
+    * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
+    */
+   init: function(el, attributes, duration, method) {
+
+      /**
+       * Whether or not the animation is running.
+       * @private
+       * @type {Boolen}
+       */
+      var isAnimated = false;
+
+      /**
+       * A Date object that is created when the animation begins.
+       * @private
+       * @type {Date}
+       */
+      var startTime = null;
+
+      /**
+       * A Date object that is created when the animation ends.
+       * @private
+       * @type {Date}
+       */
+      var endTime = null;
+
+      /**
+       * The number of frames this animation was able to execute.
+       * @private
+       * @type {Int}
+       */
+      var actualFrames = 0;
+
+      /**
+       * The attribute values that will be used if no "from" is supplied.
+       * @private
+       * @type {Object}
+       */
+      var defaultValues = {};
+
+      /**
+       * The element to be animated.
+       * @private
+       * @type {HTMLElement}
+       */
+      el = YAHOO.util.Dom.get(el);
+
+      /**
+       * The collection of attributes to be animated.
+       * Each attribute must have at least a "to" or "by" defined in order to animate.
+       * If "to" is supplied, the animation will end with the attribute at that value.
+       * If "by" is supplied, the animation will end at that value plus its starting value.
+       * If both are supplied, "to" is used, and "by" is ignored.
+       * Optional additional member include "from" (the value the attribute should start animating from, defaults to current value), and "unit" (the units to apply to the values).
+       * @type {Object}
+       */
+      this.attributes = attributes || {};
+
+      /**
+       * The length of the animation.  Defaults to "1" (second).
+       * @type {Number}
+       */
+      this.duration = duration || 1;
+
+      /**
+       * The method that will provide values to the attribute(s) during the animation.
+       * Defaults to "YAHOO.util.Easing.easeNone".
+       * @type {Function}
+       */
+      this.method = method || YAHOO.util.Easing.easeNone;
+
+      /**
+       * Whether or not the duration should be treated as seconds.
+       * Defaults to true.
+       * @type {Boolean}
+       */
+      this.useSeconds = true; // default to seconds
+
+      /**
+       * The location of the current animation on the timeline.
+       * In time-based animations, this is used by AnimMgr to ensure the animation finishes on time.
+       * @type {Int}
+       */
+      this.currentFrame = 0;
+
+      /**
+       * The total number of frames to be executed.
+       * In time-based animations, this is used by AnimMgr to ensure the animation finishes on time.
+       * @type {Int}
+       */
+      this.totalFrames = YAHOO.util.AnimMgr.fps;
+
+
+      /**
+       * Returns a reference to the animated element.
+       * @return {HTMLElement}
+       */
+      this.getEl = function() { return el; };
+
+
+      /**
+       * Sets the default value to be used when "from" is not supplied.
+       * @param {String} attribute The attribute being set.
+       * @param {Number} val The default value to be applied to the attribute.
+       */
+      this.setDefault = function(attribute, val) {
+         if ( val == 'auto' ) { // if 'auto' set defaults for well known attributes, zero for others
+            switch(attribute) {
+               case'width':
+                  val = el.clientWidth || el.offsetWidth; // computed width
+                  break;
+               case 'height':
+                  val = el.clientHeight || el.offsetHeight; // computed height
+                  break;
+               case 'left':
+                  if (YAHOO.util.Dom.getStyle(el, 'position') == 'absolute') {
+                     val = el.offsetLeft; // computed left
+                  } else {
+                     val = 0;
+                  }
+                  break;
+               case 'top':
+                  if (YAHOO.util.Dom.getStyle(el, 'position') == 'absolute') {
+                     val = el.offsetTop; // computed top
+                  } else {
+                     val = 0;
+                  }
+                  break;
+               default:
+                  val = 0;
+            }
+         }
+
+         defaultValues[attribute] = val;
+      }
+
+      /**
+       * Returns the default value for the given attribute.
+       * @param {String} attribute The attribute whose value will be returned.
+       */
+      this.getDefault = function(attribute) {
+         return defaultValues[attribute];
+      };
+
+      /**
+       * Checks whether the element is currently animated.
+       * @return {Boolean} current value of isAnimated.
+       */
+      this.isAnimated = function() {
+         return isAnimated;
+      };
+
+      /**
+       * Returns the animation start time.
+       * @return {Date} current value of startTime.
+       */
+      this.getStartTime = function() {
+         return startTime;
+      };
+
+      /**
+       * Starts the animation by registering it with the animation manager.
+       */
+      this.animate = function() {
+         this.onStart.fire();
+         this._onStart.fire();
+
+         this.totalFrames = ( this.useSeconds ) ? Math.ceil(YAHOO.util.AnimMgr.fps * this.duration) : this.duration;
+         YAHOO.util.AnimMgr.registerElement(this);
+
+         // get starting values or use defaults
+         var attributes = this.attributes;
+         var el = this.getEl();
+         var val;
+
+         for (var attribute in attributes) {
+            val = this.getAttribute(attribute);
+            this.setDefault(attribute, val);
+         }
+
+         isAnimated = true;
+         actualFrames = 0;
+         startTime = new Date();
+      };
+
+      /**
+       * Stops the animation.  Normally called by AnimMgr when animation completes.
+       */
+      this.stop = function() {
+         this.currentFrame = 0;
+
+         endTime = new Date();
+
+         var data = {
+            time: endTime,
+            duration: endTime - startTime,
+            frames: actualFrames,
+            fps: actualFrames / this.duration
+         };
+
+         isAnimated = false;
+         actualFrames = 0;
+
+         this.onComplete.fire(data);
+      };
+
+      /**
+       * Feeds the starting and ending values for each animated attribute to doMethod once per frame, then applies the resulting value to the attribute(s).
+       * @private
+       */
+      var onTween = function() {
+         var start;
+         var end = null;
+         var val;
+         var unit;
+         var attributes = this['attributes'];
+
+         for (var attribute in attributes) {
+            unit = attributes[attribute]['unit'] || this.defaultUnits[attribute] || this.defaultUnit;
+
+            if (typeof attributes[attribute]['from'] != 'undefined') {
+               start = attributes[attribute]['from'];
+            } else {
+               start = this.getDefault(attribute);
+            }
+
+            // To beats by, per SMIL 2.1 spec
+            if (typeof attributes[attribute]['to'] != 'undefined') {
+               end = attributes[attribute]['to'];
+            } else if (typeof attributes[attribute]['by'] != 'undefined') {
+               end = start + attributes[attribute]['by'];
+            }
+
+            // if end is null, dont change value
+            if (end !== null && typeof end != 'undefined') {
+
+               val = this.doMethod(attribute, start, end);
+
+               // negative not allowed for these (others too, but these are most common)
+               if ( (attribute == 'width' || attribute == 'height' || attribute == 'opacity') && val < 0 ) {
+                  val = 0;
+               }
+
+               this.setAttribute(attribute, val, unit);
+            }
+         }
+
+         actualFrames += 1;
+      };
+
+      /**
+       * Custom event that fires after onStart, useful in subclassing
+       * @private
+       */
+      this._onStart = new YAHOO.util.CustomEvent('_onStart', this);
+
+      /**
+       * Custom event that fires when animation begins
+       * Listen via subscribe method
+       */
+      this.onStart = new YAHOO.util.CustomEvent('start', this);
+
+      /**
+       * Custom event that fires between each frame
+       * Listen via subscribe method
+       */
+      this.onTween = new YAHOO.util.CustomEvent('tween', this);
+
+      /**
+       * Custom event that fires after onTween
+       * @private
+       */
+      this._onTween = new YAHOO.util.CustomEvent('_tween', this);
+
+      /**
+       * Custom event that fires when animation ends
+       * Listen via subscribe method
+       */
+      this.onComplete = new YAHOO.util.CustomEvent('complete', this);
+
+      this._onTween.subscribe(onTween);
+   }
+};
+
+/**
+ * @class Handles animation queueing and threading.
+ * Used by Anim and subclasses.
+ */
+YAHOO.util.AnimMgr = new function() {
+   /**
+    * Reference to the animation Interval
+    * @private
+    * @type Int
+    */
+   var thread = null;
+
+   /**
+    * The current queue of registered animation objects.
+    * @private
+    * @type Array
+    */
+   var queue = [];
+
+   /**
+    * The number of active animations.
+    * @private
+    * @type Int
+    */
+   var tweenCount = 0;
+
+   /**
+    * Base frame rate (frames per second).
+    * Arbitrarily high for better x-browser calibration (slower browsers drop more frames).
+    * @type Int
+    *
+    */
+   this.fps = 200;
+
+   /**
+    * Interval delay in milliseconds, defaults to fastest possible.
+    * @type Int
+    *
+    */
+   this.delay = 1;
+
+   /**
+    * Adds an animation instance to the animation queue.
+    * All animation instances must be registered in order to animate.
+    * @param {object} tween The Anim instance to be be registered
+    */
+   this.registerElement = function(tween) {
+      if ( tween.isAnimated() ) { return false; }// but not if already animating
+
+      queue[queue.length] = tween;
+      tweenCount += 1;
+
+      this.start();
+   };
+
+   /**
+    * Starts the animation thread.
+	 * Only one thread can run at a time.
+    */
+   this.start = function() {
+      if (thread === null) { thread = setInterval(this.run, this.delay); }
+   };
+
+   /**
+    * Stops the animation thread or a specific animation instance.
+    * @param {object} tween A specific Anim instance to stop (optional)
+    * If no instance given, Manager stops thread and all animations.
+    */
+   this.stop = function(tween) {
+      if (!tween)
+      {
+         clearInterval(thread);
+         for (var i = 0, len = queue.length; i < len; ++i) {
+            if (queue[i].isAnimated()) {
+               queue[i].stop();
+            }
+         }
+         queue = [];
+         thread = null;
+         tweenCount = 0;
+      }
+      else {
+         tween.stop();
+         tweenCount -= 1;
+
+         if (tweenCount <= 0) { this.stop(); }
+      }
+   };
+
+   /**
+    * Called per Interval to handle each animation frame.
+    */
+   this.run = function() {
+      for (var i = 0, len = queue.length; i < len; ++i) {
+         var tween = queue[i];
+         if ( !tween || !tween.isAnimated() ) { continue; }
+
+         if (tween.currentFrame < tween.totalFrames || tween.totalFrames === null)
+         {
+            tween.currentFrame += 1;
+
+            if (tween.useSeconds) {
+               correctFrame(tween);
+            }
+
+            tween.onTween.fire();
+            tween._onTween.fire();
+         }
+         else { YAHOO.util.AnimMgr.stop(tween); }
+      }
+   };
+
+   /**
+    * On the fly frame correction to keep animation on time.
+    * @private
+    * @param {Object} tween The Anim instance being corrected.
+    */
+   var correctFrame = function(tween) {
+      var frames = tween.totalFrames;
+      var frame = tween.currentFrame;
+      var expected = (tween.currentFrame * tween.duration * 1000 / tween.totalFrames);
+      var elapsed = (new Date() - tween.getStartTime());
+      var tweak = 0;
+
+      if (elapsed < tween.duration * 1000) { // check if falling behind
+         tweak = Math.round((elapsed / expected - 1) * tween.currentFrame);
+      } else { // went over duration, so jump to end
+         tweak = frames - (frame + 1);
+      }
+      if (tweak > 0 && isFinite(tweak)) { // adjust if needed
+         if (tween.currentFrame + tweak >= frames) {// dont go past last frame
+            tweak = frames - (frame + 1);
+         }
+
+         tween.currentFrame += tweak;
+      }
+   };
+}
+
+/**
+ *
+ * @class Used to calculate Bezier splines for any number of control points.
+ *
+ */
+YAHOO.util.Bezier = new function()
+{
+   /**
+    * Get the current position of the animated element based on t.
+    * @param {array} points An array containing Bezier points.
+    * Each point is an array of "x" and "y" values (0 = x, 1 = y)
+    * At least 2 points are required (start and end).
+    * First point is start. Last point is end.
+    * Additional control points are optional.
+    * @param {float} t Basis for determining current position (0 < t < 1)
+    * @return {object} An object containing int x and y member data
+    */
+   this.getPosition = function(points, t)
+   {
+      var n = points.length;
+      var tmp = [];
+
+      for (var i = 0; i < n; ++i){
+         tmp[i] = [points[i][0], points[i][1]]; // save input
+      }
+
+      for (var j = 1; j < n; ++j) {
+         for (i = 0; i < n - j; ++i) {
+            tmp[i][0] = (1 - t) * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0];
+            tmp[i][1] = (1 - t) * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1];
+         }
+      }
+
+      return [ tmp[0][0], tmp[0][1] ];
+
+   };
+};
+
+/**
+ * @class Class for defining the acceleration rate and path of animations.
+ */
+YAHOO.util.Easing = new function() {
+
+   /**
+    * Uniform speed between points.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.easeNone = function(t, b, c, d) {
+	return b+c*(t/=d);
+   };
+
+   /**
+    * Begins slowly and accelerates towards end.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.easeIn = function(t, b, c, d) {
+   	return b+c*((t/=d)*t*t);
+   };
+
+   /**
+    * Begins quickly and decelerates towards end.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.easeOut = function(t, b, c, d) {
+   	var ts=(t/=d)*t;
+   	var tc=ts*t;
+   	return b+c*(tc + -3*ts + 3*t);
+   };
+
+   /**
+    * Begins slowly and decelerates towards end.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.easeBoth = function(t, b, c, d) {
+   	var ts=(t/=d)*t;
+   	var tc=ts*t;
+   	return b+c*(-2*tc + 3*ts);
+   };
+
+   /**
+    * Begins by going below staring value.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.backIn = function(t, b, c, d) {
+   	var ts=(t/=d)*t;
+   	var tc=ts*t;
+   	return b+c*(-3.4005*tc*ts + 10.2*ts*ts + -6.2*tc + 0.4*ts);
+   };
+
+   /**
+    * End by going beyond ending value.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.backOut = function(t, b, c, d) {
+   	var ts=(t/=d)*t;
+   	var tc=ts*t;
+   	return b+c*(8.292*tc*ts + -21.88*ts*ts + 22.08*tc + -12.69*ts + 5.1975*t);
+   };
+
+   /**
+    * Starts by going below staring value, and ends by going beyond ending value.
+    * @param {Number} t Time value used to compute current value.
+    * @param {Number} b Starting value.
+    * @param {Number} c Delta between start and end values.
+    * @param {Number} d Total length of animation.
+    * @return {Number} The computed value for the current animation frame.
+    */
+   this.backBoth = function(t, b, c, d) {
+   	var ts=(t/=d)*t;
+   	var tc=ts*t;
+   	return b+c*(0.402*tc*ts + -2.1525*ts*ts + -3.2*tc + 8*ts + -2.05*t);
+   };
+};
+
+/**
+ * @class Anim subclass for moving elements along a path defined by the "points" member of "attributes".  All "points" are arrays with x, y coordinates.
+ * <p>Usage: <code>var myAnim = new YAHOO.util.Motion(el, { points: { to: [800, 800] } }, 1, YAHOO.util.Easing.easeOut);</code></p>
+ * @requires YAHOO.util.Anim
+ * @requires YAHOO.util.AnimMgr
+ * @requires YAHOO.util.Easing
+ * @requires YAHOO.util.Bezier
+ * @requires YAHOO.util.Dom
+ * @requires YAHOO.util.Event
+ * @constructor
+ * @param {HTMLElement | String} el Reference to the element that will be animated
+ * @param {Object} attributes The attribute(s) to be animated.
+ * Each attribute is an object with at minimum a "to" or "by" member defined.
+ * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
+ * All attribute names use camelCase.
+ * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
+ * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
+ */
+YAHOO.util.Motion = function(el, attributes, duration, method) {
+   if (el) {
+      this.initMotion(el, attributes, duration, method);
+   }
+};
+
+YAHOO.util.Motion.prototype = new YAHOO.util.Anim();
+
+/**
+ * Per attribute units that should be used by default.
+ * Motion points default to 'px' units.
+ * @type Object
+ */
+YAHOO.util.Motion.prototype.defaultUnits.points = 'px';
+
+/**
+ * Returns the value computed by the animation's "method".
+ * @param {String} attribute The name of the attribute.
+ * @param {Number} start The value this attribute should start from for this animation.
+ * @param {Number} end  The value this attribute should end at for this animation.
+ * @return {Number} The Value to be applied to the attribute.
+ */
+YAHOO.util.Motion.prototype.doMethod = function(attribute, start, end) {
+   var val = null;
+
+   if (attribute == 'points') {
+      var translatedPoints = this.getTranslatedPoints();
+      var t = this.method(this.currentFrame, 0, 100, this.totalFrames) / 100;
+
+      if (translatedPoints) {
+         val = YAHOO.util.Bezier.getPosition(translatedPoints, t);
+      }
+
+   } else {
+      val = this.method(this.currentFrame, start, end - start, this.totalFrames);
+   }
+
+   return val;
+};
+
+/**
+ * Returns current value of the attribute.
+ * @param {String} attribute The name of the attribute.
+ * @return {Number} val The current value of the attribute.
+ */
+YAHOO.util.Motion.prototype.getAttribute = function(attribute) {
+   var val = null;
+
+   if (attribute == 'points') {
+      val = [ this.getAttribute('left'), this.getAttribute('top') ];
+      if ( isNaN(val[0]) ) { val[0] = 0; }
+      if ( isNaN(val[1]) ) { val[1] = 0; }
+   } else {
+      val = parseFloat( YAHOO.util.Dom.getStyle(this.getEl(), attribute) );
+   }
+
+   return val;
+};
+
+/**
+ * Applies a value to an attribute
+ * @param {String} attribute The name of the attribute.
+ * @param {Number} val The value to be applied to the attribute.
+ * @param {String} unit The unit ('px', '%', etc.) of the value.
+ */
+YAHOO.util.Motion.prototype.setAttribute = function(attribute, val, unit) {
+   if (attribute == 'points') {
+      YAHOO.util.Dom.setStyle(this.getEl(), 'left', val[0] + unit);
+      YAHOO.util.Dom.setStyle(this.getEl(), 'top', val[1] + unit);
+   } else {
+      YAHOO.util.Dom.setStyle(this.getEl(), attribute, val + unit);
+   }
+};
+
+/**
+ * @param {HTMLElement | String} el Reference to the element that will be animated
+ * @param {Object} attributes The attribute(s) to be animated.
+ * Each attribute is an object with at minimum a "to" or "by" member defined.
+ * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
+ * All attribute names use camelCase.
+ * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
+ * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
+ */
+YAHOO.util.Motion.prototype.initMotion = function(el, attributes, duration, method) {
+   YAHOO.util.Anim.call(this, el, attributes, duration, method);
+
+   attributes = attributes || {};
+   attributes.points = attributes.points || {};
+   attributes.points.control = attributes.points.control || [];
+
+   this.attributes = attributes;
+
+   var start;
+   var end = null;
+   var translatedPoints = null;
+
+   this.getTranslatedPoints = function() { return translatedPoints; };
+
+   var translateValues = function(val, self) {
+      var pageXY = YAHOO.util.Dom.getXY(self.getEl());
+      val = [ val[0] - pageXY[0] + start[0], val[1] - pageXY[1] + start[1] ];
+
+      return val;
+   };
+
+   var onStart = function() {
+      start = this.getAttribute('points');
+      var attributes = this.attributes;
+      var control =  attributes['points']['control'] || [];
+
+      if (control.length > 0 && control[0].constructor != Array) { // could be single point or array of points
+         control = [control];
+      }
+
+      if (YAHOO.util.Dom.getStyle(this.getEl(), 'position') == 'static') { // default to relative
+         YAHOO.util.Dom.setStyle(this.getEl(), 'position', 'relative');
+      }
+
+      if (typeof attributes['points']['from'] != 'undefined') {
+         YAHOO.util.Dom.setXY(this.getEl(), attributes['points']['from']); // set to from point
+         start = this.getAttribute('points'); // get actual offset values
+      }
+      else if ((start[0] === 0 || start[1] === 0)) { // these sometimes up when auto
+         YAHOO.util.Dom.setXY(this.getEl(), YAHOO.util.Dom.getXY(this.getEl())); // set it to current position, giving offsets
+         start = this.getAttribute('points'); // get actual offset values
+      }
+
+      var i, len;
+      // TO beats BY, per SMIL 2.1 spec
+      if (typeof attributes['points']['to'] != 'undefined') {
+         end = translateValues(attributes['points']['to'], this);
+
+         for (i = 0, len = control.length; i < len; ++i) {
+            control[i] = translateValues(control[i], this);
+         }
+
+      } else if (typeof attributes['points']['by'] != 'undefined') {
+         end = [ start[0] + attributes['points']['by'][0], start[1] + attributes['points']['by'][1]];
+
+         for (i = 0, len = control.length; i < len; ++i) {
+            control[i] = [ start[0] + control[i][0], start[1] + control[i][1] ];
+         }
+      }
+
+      if (end) {
+         translatedPoints = [start];
+
+         if (control.length > 0) { translatedPoints = translatedPoints.concat(control); }
+
+         translatedPoints[translatedPoints.length] = end;
+      }
+   };
+
+   this._onStart.subscribe(onStart);
+};
+
+/**
+ * @class Anim subclass for scrolling elements to a position defined by the "scroll" member of "attributes".  All "scroll" members are arrays with x, y scroll positions.
+ * <p>Usage: <code>var myAnim = new YAHOO.util.Scroll(el, { scroll: { to: [0, 800] } }, 1, YAHOO.util.Easing.easeOut);</code></p>
+ * @requires YAHOO.util.Anim
+ * @requires YAHOO.util.AnimMgr
+ * @requires YAHOO.util.Easing
+ * @requires YAHOO.util.Bezier
+ * @requires YAHOO.util.Dom
+ * @requires YAHOO.util.Event
+ * @constructor
+ * @param {HTMLElement | String} el Reference to the element that will be animated
+ * @param {Object} attributes The attribute(s) to be animated.
+ * Each attribute is an object with at minimum a "to" or "by" member defined.
+ * Additional optional members are "from" (defaults to current value), "units" (defaults to "px").
+ * All attribute names use camelCase.
+ * @param {Number} duration (optional, defaults to 1 second) Length of animation (frames or seconds), defaults to time-based
+ * @param {Function} method (optional, defaults to YAHOO.util.Easing.easeNone) Computes the values that are applied to the attributes per frame (generally a YAHOO.util.Easing method)
+ */
+YAHOO.util.Scroll = function(el, attributes, duration,  method) {
+   if (el) {
+      YAHOO.util.Anim.call(this, el, attributes, duration, method);
+   }
+};
+
+YAHOO.util.Scroll.prototype = new YAHOO.util.Anim();
+
+/**
+ * Per attribute units that should be used by default.
+ * Scroll positions default to no units.
+ * @type Object
+ */
+YAHOO.util.Scroll.prototype.defaultUnits.scroll = ' ';
+
+/**
+ * Returns the value computed by the animation's "method".
+ * @param {String} attribute The name of the attribute.
+ * @param {Number} start The value this attribute should start from for this animation.
+ * @param {Number} end  The value this attribute should end at for this animation.
+ * @return {Number} The Value to be applied to the attribute.
+ */
+YAHOO.util.Scroll.prototype.doMethod = function(attribute, start, end) {
+   var val = null;
+
+   if (attribute == 'scroll') {
+      val = [
+         this.method(this.currentFrame, start[0], end[0] - start[0], this.totalFrames),
+         this.method(this.currentFrame, start[1], end[1] - start[1], this.totalFrames)
+      ];
+
+   } else {
+      val = this.method(this.currentFrame, start, end - start, this.totalFrames);
+   }
+   return val;
+}
+
+/**
+ * Returns current value of the attribute.
+ * @param {String} attribute The name of the attribute.
+ * @return {Number} val The current value of the attribute.
+ */
+YAHOO.util.Scroll.prototype.getAttribute = function(attribute) {
+   var val = null;
+   var el = this.getEl();
+
+   if (attribute == 'scroll') {
+      val = [ el.scrollLeft, el.scrollTop ];
+   } else {
+      val = parseFloat( YAHOO.util.Dom.getStyle(el, attribute) );
+   }
+
+   return val;
+};
+
+/**
+ * Applies a value to an attribute
+ * @param {String} attribute The name of the attribute.
+ * @param {Number} val The value to be applied to the attribute.
+ * @param {String} unit The unit ('px', '%', etc.) of the value.
+ */
+YAHOO.util.Scroll.prototype.setAttribute = function(attribute, val, unit) {
+   var el = this.getEl();
+
+   if (attribute == 'scroll') {
+      el.scrollLeft = val[0];
+      el.scrollTop = val[1];
+   } else {
+      YAHOO.util.Dom.setStyle(el, attribute, val + unit);
+   }
+};
+
diff --git a/web/build/dom.js b/web/build/dom.js
new file mode 100644
index 000000000..acea31f0d
--- /dev/null
+++ b/web/build/dom.js
@@ -0,0 +1,433 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ * @class Provides helper methods for DOM elements.
+ */
+YAHOO.util.Dom = new function() {
+
+   /**
+    * Returns an HTMLElement reference
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @return {HTMLElement} A DOM reference to an HTML element.
+    */
+   this.get = function(el) {
+      if (typeof el == 'string') { // accept object or id
+         el = document.getElementById(el);
+      }
+
+      return el;
+   };
+
+   /**
+    * Normalizes currentStyle and ComputedStyle.
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @param {String} property The style property whose value is returned.
+    * @return {String} The current value of the style property.
+    */
+   this.getStyle = function(el, property) {
+      var value = null;
+      var dv = document.defaultView;
+
+      el = this.get(el);
+
+      if (property == 'opacity' && el.filters) {// IE opacity
+         value = 1;
+         try {
+            value = el.filters.item('DXImageTransform.Microsoft.Alpha').opacity / 100;
+         } catch(e) {
+            try {
+               value = el.filters.item('alpha').opacity / 100;
+            } catch(e) {}
+         }
+      }
+      else if (el.style[property]) {
+         value = el.style[property];
+      }
+      else if (el.currentStyle && el.currentStyle[property]) {
+         value = el.currentStyle[property];
+      }
+      else if ( dv && dv.getComputedStyle )
+      {  // convert camelCase to hyphen-case
+
+         var converted = '';
+         for(i = 0, len = property.length;i < len; ++i) {
+            if (property.charAt(i) == property.charAt(i).toUpperCase()) {
+               converted = converted + '-' + property.charAt(i).toLowerCase();
+            } else {
+               converted = converted + property.charAt(i);
+            }
+         }
+
+         if (dv.getComputedStyle(el, '').getPropertyValue(converted)) {
+            value = dv.getComputedStyle(el, '').getPropertyValue(converted);
+         }
+      }
+
+      return value;
+   };
+
+   /**
+    * Wrapper for setting style properties of HTMLElements.  Normalizes "opacity" across modern browsers.
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @param {String} property The style property to be set.
+    * @param {String} val The value to apply to the given property.
+    */
+   this.setStyle = function(el, property, val) {
+      el = this.get(el);
+      switch(property) {
+         case 'opacity' :
+            if (el.filters) {
+               el.style.filter = 'alpha(opacity=' + val * 100 + ')';
+
+               if (!el.currentStyle.hasLayout) {
+                  el.style.zoom = 1;
+               }
+            } else {
+               el.style.opacity = val;
+               el.style['-moz-opacity'] = val;
+               el.style['-khtml-opacity'] = val;
+            }
+            break;
+         default :
+            el.style[property] = val;
+      }
+   };
+
+   /**
+    * Gets the current position of an element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    */
+   this.getXY = function(el) {
+      el = this.get(el);
+
+      // has to be part of document to have pageXY
+      if (el.parentNode === null || this.getStyle(el, 'display') == 'none') {
+         return false;
+      }
+
+      /**
+       * Position of the html element (x, y)
+       * @private
+       * @type Array
+       */
+      var parent = null;
+      var pos = [];
+      var box;
+
+      if (el.getBoundingClientRect) { // IE
+         box = el.getBoundingClientRect();
+         var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
+         var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
+
+         return [box.left + scrollLeft, box.top + scrollTop];
+      }
+      else if (document.getBoxObjectFor) { // gecko
+         box = document.getBoxObjectFor(el);
+         pos = [box.x, box.y];
+      }
+      else { // safari/opera
+         pos = [el.offsetLeft, el.offsetTop];
+         parent = el.offsetParent;
+         if (parent != el) {
+            while (parent) {
+               pos[0] += parent.offsetLeft;
+               pos[1] += parent.offsetTop;
+               parent = parent.offsetParent;
+            }
+         }
+
+         // opera & (safari absolute) incorrectly account for body offsetTop
+         var ua = navigator.userAgent.toLowerCase();
+         if (
+            ua.indexOf('opera') != -1
+            || ( ua.indexOf('safari') != -1 && this.getStyle(el, 'position') == 'absolute' )
+         ) {
+            pos[1] -= document.body.offsetTop;
+         }
+      }
+
+      if (el.parentNode) { parent = el.parentNode; }
+      else { parent = null; }
+
+      while (parent && parent.tagName != 'BODY' && parent.tagName != 'HTML') {
+         pos[0] -= parent.scrollLeft;
+         pos[1] -= parent.scrollTop;
+
+         if (parent.parentNode) { parent = parent.parentNode; }
+         else { parent = null; }
+      }
+
+      return pos;
+   };
+
+   /**
+    * Gets the current X position of an element based on page coordinates.  The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    */
+   this.getX = function(el) {
+      return this.getXY(el)[0];
+   };
+
+   /**
+    * Gets the current Y position of an element based on page coordinates.  Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    */
+   this.getY = function(el) {
+      return this.getXY(el)[1];
+   };
+
+   /**
+    * Set the position of an html element in page coordinates, regardless of how the element is positioned.
+    * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @param {array} pos Contains X & Y values for new position (coordinates are page-based)
+    */
+   this.setXY = function(el, pos, noRetry) {
+      el = this.get(el);
+      var pageXY = YAHOO.util.Dom.getXY(el);
+      if (pageXY === false) { return false; } // has to be part of doc to have pageXY
+
+      if (this.getStyle(el, 'position') == 'static') { // default to relative
+         this.setStyle(el, 'position', 'relative');
+      }
+
+      var delta = [
+         parseInt( YAHOO.util.Dom.getStyle(el, 'left'), 10 ),
+         parseInt( YAHOO.util.Dom.getStyle(el, 'top'), 10 )
+      ];
+
+      if ( isNaN(delta[0]) ) { delta[0] = 0; } // defalts to 'auto'
+      if ( isNaN(delta[1]) ) { delta[1] = 0; }
+
+      if (pos[0] !== null) { el.style.left = pos[0] - pageXY[0] + delta[0] + 'px'; }
+      if (pos[1] !== null) { el.style.top = pos[1] - pageXY[1] + delta[1] + 'px'; }
+
+      var newXY = this.getXY(el);
+
+      // if retry is true, try one more time if we miss
+      if (!noRetry && (newXY[0] != pos[0] || newXY[1] != pos[1]) ) {
+         this.setXY(el, pos, true);
+      }
+
+      return true;
+   };
+
+   /**
+    * Set the X position of an html element in page coordinates, regardless of how the element is positioned.
+    * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @param {Int} x to use as the X coordinate.
+    */
+   this.setX = function(el, x) {
+      return this.setXY(el, [x, null]);
+   };
+
+   /**
+    * Set the Y position of an html element in page coordinates, regardless of how the element is positioned.
+    * The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @param {Int} Value to use as the Y coordinate.
+    */
+   this.setY = function(el, y) {
+      return this.setXY(el, [null, y]);
+   };
+
+   /**
+    * Returns the region position of the given element.
+    * The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
+    * @param {String | HTMLElement} Accepts either a string to use as an ID for getting a DOM reference, or an actual DOM reference.
+    * @return {Region} A Region instance containing "top, left, bottom, right" member data.
+    */
+   this.getRegion = function(el) {
+      el = this.get(el);
+      return new YAHOO.util.Region.getRegion(el);
+   };
+
+   /**
+    * Returns the width of the client (viewport).
+    * @return {Int} The width of the viewable area of the page.
+    */
+   this.getClientWidth = function() {
+      return (
+         document.documentElement.offsetWidth
+         || document.body.offsetWidth
+      );
+   };
+
+   /**
+    * Returns the height of the client (viewport).
+    * @return {Int} The height of the viewable area of the page.
+    */
+   this.getClientHeight = function() {
+      return (
+         self.innerHeight
+         || document.documentElement.clientHeight
+         || document.body.clientHeight
+      );
+   };
+};
+
+/**
+ * @class A region is a representation of an object on a grid.  It is defined
+ * by the top, right, bottom, left extents, so is rectangular by default.  If
+ * other shapes are required, this class could be extended to support it.
+ *
+ * @param {int} t the top extent
+ * @param {int} r the right extent
+ * @param {int} b the bottom extent
+ * @param {int} l the left extent
+ * @constructor
+ */
+YAHOO.util.Region = function(t, r, b, l) {
+
+    /**
+     * The region's top extent
+     * @type int
+     */
+    this.top = t;
+
+    /**
+     * The region's right extent
+     * @type int
+     */
+    this.right = r;
+
+    /**
+     * The region's bottom extent
+     * @type int
+     */
+    this.bottom = b;
+
+    /**
+     * The region's left extent
+     * @type int
+     */
+    this.left = l;
+};
+
+/**
+ * Returns true if this region contains the region passed in
+ *
+ * @param  {Region}  region The region to evaluate
+ * @return {boolean}        True if the region is contained with this region,
+ *                          else false
+ */
+YAHOO.util.Region.prototype.contains = function(region) {
+    return ( region.left   >= this.left   &&
+             region.right  <= this.right  &&
+             region.top    >= this.top    &&
+             region.bottom <= this.bottom    );
+};
+
+/**
+ * Returns the area of the region
+ *
+ * @return {int} the region's area
+ */
+YAHOO.util.Region.prototype.getArea = function() {
+    return ( (this.bottom - this.top) * (this.right - this.left) );
+};
+
+/**
+ * Returns the region where the passed in region overlaps with this one
+ *
+ * @param  {Region} region The region that intersects
+ * @return {Region}        The overlap region, or null if there is no overlap
+ */
+YAHOO.util.Region.prototype.intersect = function(region) {
+    var t = Math.max( this.top,    region.top    );
+    var r = Math.min( this.right,  region.right  );
+    var b = Math.min( this.bottom, region.bottom );
+    var l = Math.max( this.left,   region.left   );
+
+    if (b >= t && r >= l) {
+        return new YAHOO.util.Region(t, r, b, l);
+    } else {
+        return null;
+    }
+};
+
+/**
+ * Returns the region representing the smallest region that can contain both
+ * the passed in region and this region.
+ *
+ * @param  {Region} region The region that to create the union with
+ * @return {Region}        The union region
+ */
+YAHOO.util.Region.prototype.union = function(region) {
+    var t = Math.min( this.top,    region.top    );
+    var r = Math.max( this.right,  region.right  );
+    var b = Math.max( this.bottom, region.bottom );
+    var l = Math.min( this.left,   region.left   );
+
+    return new YAHOO.util.Region(t, r, b, l);
+};
+
+/**
+ * toString
+ * @return string the region properties
+ */
+YAHOO.util.Region.prototype.toString = function() {
+    return ( "Region {" +
+             "  t: "    + this.top    +
+             ", r: "    + this.right  +
+             ", b: "    + this.bottom +
+             ", l: "    + this.left   +
+             "}" );
+}
+
+/**
+ * Returns a region that is occupied by the DOM element
+ *
+ * @param  {HTMLElement} el The element
+ * @return {Region}         The region that the element occupies
+ * @static
+ */
+YAHOO.util.Region.getRegion = function(el) {
+    var p = YAHOO.util.Dom.getXY(el);
+
+    var t = p[1];
+    var r = p[0] + el.offsetWidth;
+    var b = p[1] + el.offsetHeight;
+    var l = p[0];
+
+    return new YAHOO.util.Region(t, r, b, l);
+};
+
+/////////////////////////////////////////////////////////////////////////////
+
+
+/**
+ * @class
+ *
+ * A point is a region that is special in that it represents a single point on
+ * the grid.
+ *
+ * @param {int} x The X position of the point
+ * @param {int} y The Y position of the point
+ * @constructor
+ * @extends Region
+ */
+YAHOO.util.Point = function(x, y) {
+    /**
+     * The X position of the point
+     * @type int
+     */
+    this.x      = x;
+
+    /**
+     * The Y position of the point
+     * @type int
+     */
+    this.y      = y;
+
+    this.top    = y;
+    this.right  = x;
+    this.bottom = y;
+    this.left   = x;
+};
+
+YAHOO.util.Point.prototype = new YAHOO.util.Region();
diff --git a/web/build/dragdrop-debug.js b/web/build/dragdrop-debug.js
new file mode 100644
index 000000000..25d1c3c3d
--- /dev/null
+++ b/web/build/dragdrop-debug.js
@@ -0,0 +1,2517 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ * @class Defines the interface and base operation of items that that can be
+ * dragged or can be drop targets.  It was designed to be extended, overriding
+ * the event handlers for startDrag, onDrag, onDragOver, onDragOut.
+ * Up to three html elements can be associated with a DragDrop instance:
+ * <ul>
+ * <li>linked element: the element that is passed into the constructor.
+ * This is the element which defines the boundaries for interaction with
+ * other DragDrop objects.</li>
+ * <li>handle element(s): The drag operation only occurs if the element that
+ * was clicked matches a handle element.  By default this is the linked
+ * element, but there are times that you will want only a portion of the
+ * linked element to initiate the drag operation, and the setHandleElId()
+ * method provides a way to define this.</li>
+ * <li>drag element: this represents an the element that would be moved along
+ * with the cursor during a drag operation.  By default, this is the linked
+ * element itself as in {@link YAHOO.util.DD}.  setDragElId() lets you define
+ * a separate element that would be moved, as in {@link YAHOO.util.DDProxy}
+ * </li>
+ * </ul>
+ * This class should not be instantiated until the onload event to ensure that
+ * the associated elements are available.
+ * The following would define a DragDrop obj that would interact with any
+ * other * DragDrop obj in the "group1" group:
+ * <pre>
+ *  dd = new YAHOO.util.DragDrop("div1", "group1");
+ * </pre>
+ * Since none of the event handlers have been implemented, nothing would
+ * actually happen if you were to run the code above.  Normally you would
+ * override this class or one of the default implementations, but you can
+ * also override the methods you want on an instance of the class...
+ * <pre>
+ *  dd.onDragDrop = function(e, id) {
+ *   alert("dd was dropped on " + id);
+ *  }
+ * </pre>
+ * @constructor
+ * @param {String} id of the element that is linked to this instance
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+YAHOO.util.DragDrop = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+    }
+};
+
+YAHOO.util.DragDrop.prototype = {
+
+    /**
+     * The id of the element associated with this object.  This is what we
+     * refer to as the "linked element" because the size and position of
+     * this element is used to determine when the drag and drop objects have
+     * interacted.
+     *
+     * @type String
+     */
+    id: null,
+
+    /**
+     * The id of the element that will be dragged.  By default this is same
+     * as the linked element , but could be changed to another element. Ex:
+     * YAHOO.util.DDProxy
+     *
+     * @type String
+     * @private
+     */
+    dragElId: null,
+
+    /**
+     * the id of the element that initiates the drag operation.  By default
+     * this is the linked element, but could be changed to be a child of this
+     * element.  This lets us do things like only starting the drag when the
+     * header element within the linked html element is clicked.
+     *
+     * @type String
+     * @private
+     */
+    handleElId: null,
+
+    /**
+     * An array of HTML tags that will be ignored if clicked.
+     */
+    invalidHandleTypes: null,
+
+    /**
+     * The linked element's absolute X position at the time the drag was
+     * started
+     *
+     * @type int
+     * @private
+     */
+    startPageX: 0,
+
+    /**
+     * The linked element's absolute X position at the time the drag was
+     * started
+     *
+     * @type int
+     * @private
+     */
+    startPageY: 0,
+
+    /**
+     * The group defines a logical collection of DragDrop objects that are
+     * related.  Instances only get events when interacting with other
+     * DragDrop object in the same group.  This lets us define multiple
+     * groups using a single DragDrop subclass if we want.
+     *
+     */
+    groups: null,
+
+    /**
+     * Individual drag/drop instances can be locked.  This will prevent
+     * onmousedown start drag.
+     *
+     * @type boolean
+     * @private
+     */
+    locked: false,
+
+    /**
+     * Lock this instance
+     */
+    lock: function() { this.locked = true; },
+
+    /**
+     * Unlock this instace
+     */
+    unlock: function() { this.locked = false; },
+
+    /**
+     * By default, all insances can be a drop target.  This can be disabled by
+     * setting isTarget to false.
+     *
+     * @type boolean
+     */
+    isTarget: true,
+
+    /**
+     * The padding configured for this drag and drop object for calculating
+     * the drop zone intersection with this object.
+     */
+    padding: null,
+
+    /**
+     * @private
+     */
+    _domRef: null,
+
+    /**
+     * Internal typeof flag
+     * @private
+     */
+    __ygDragDrop: true,
+
+    /**
+     * Set to true when horizontal contraints are applied
+     *
+     * @type boolean
+     * @private
+     */
+    constrainX: false,
+
+    /**
+     * Set to true when vertical contraints are applied
+     *
+     * @type boolean
+     * @private
+     */
+    constrainY: false,
+
+    /**
+     * The left constraint
+     *
+     * @type int
+     * @private
+     */
+    minX: 0,
+
+    /**
+     * The right constraint
+     *
+     * @type int
+     * @private
+     */
+    maxX: 0,
+
+    /**
+     * The up constraint
+     *
+     * @type int
+     * @private
+     */
+    minY: 0,
+
+    /**
+     * The down constraint
+     *
+     * @type int
+     * @private
+     */
+    maxY: 0,
+
+    /**
+     * Maintain offsets when we resetconstraints.  Used to maintain the
+     * slider thumb value, and this needs to be fixed.
+     * @type boolean
+     */
+    maintainOffset: false,
+
+    /**
+     * Array of pixel locations the element will snap to if we specified a
+     * horizontal graduation/interval.  This array is generated automatically
+     * when you define a tick interval.
+     * @type int[]
+     */
+    xTicks: null,
+
+    /**
+     * Array of pixel locations the element will snap to if we specified a
+     * vertical graduation/interval.  This array is generated automatically
+     * when you define a tick interval.
+     * @type int[]
+     */
+    yTicks: null,
+
+    /**
+     * By default the drag and drop instance will only respond to the primary
+     * button click (left button for a right-handed mouse).  Set to true to
+     * allow drag and drop to start with any mouse click that is propogated
+     * by the browser
+     * @type boolean
+     */
+    primaryButtonOnly: true,
+
+    /**
+     * Code that executes immediately before the startDrag event
+     * @private
+     */
+    b4StartDrag: function(x, y) { },
+
+    /**
+     * Abstract method called after a drag/drop object is clicked
+     * and the drag or mousedown time thresholds have beeen met.
+     *
+     * @param {int} X click location
+     * @param {int} Y click location
+     */
+    startDrag: function(x, y) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDrag event
+     * @private
+     */
+    b4Drag: function(e) { },
+
+    /**
+     * Abstract method called during the onMouseMove event while dragging an
+     * object.
+     *
+     * @param {Event} e
+     */
+    onDrag: function(e) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragEnter event
+     * @private
+     */
+    // b4DragEnter: function(e) { },
+
+    /**
+     * Abstract method called when this element fist begins hovering over
+     * another DragDrop obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this is hovering over.  In INTERSECT mode, an array of one or more
+     * dragdrop items being hovered over.
+     */
+    onDragEnter: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragOver event
+     * @private
+     */
+    b4DragOver: function(e) { },
+
+    /**
+     * Abstract method called when this element is hovering over another
+     * DragDrop obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this is hovering over.  In INTERSECT mode, an array of dd items
+     * being hovered over.
+     */
+    onDragOver: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragOut event
+     * @private
+     */
+    b4DragOut: function(e) { },
+
+    /**
+     * Abstract method called when we are no longer hovering over an element
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this was hovering over.  In INTERSECT mode, an array of dd items
+     * that the mouse is no longer over.
+     */
+    onDragOut: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragDrop event
+     * @private
+     */
+    b4DragDrop: function(e) { },
+
+    /**
+     * Abstract method called when this item is dropped on another DragDrop
+     * obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this was dropped on.  In INTERSECT mode, an array of dd items this
+     * was dropped on.
+     */
+    onDragDrop: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the endDrag event
+     * @private
+     */
+    b4EndDrag: function(e) { },
+
+    /**
+     * Fired when we are done dragging the object
+     *
+     * @param {Event} e
+     */
+    endDrag: function(e) { /* override this */ },
+
+    /**
+     * Code executed immediately before the onMouseDown event
+
+     * @param {Event} e
+     * @private
+     */
+    b4MouseDown: function(e) {  },
+
+    /**
+     * Event handler that fires when a drag/drop obj gets a mousedown
+     * @param {Event} e
+     */
+    onMouseDown: function(e) { /* override this */ },
+
+    /**
+     * Event handler that fires when a drag/drop obj gets a mouseup
+     * @param {Event} e
+     */
+    onMouseUp: function(e) { /* override this */ },
+
+    /**
+     * Returns a reference to the linked element
+     *
+     * @return {Object} the html element
+     */
+    getEl: function() {
+        if (!this._domRef) {
+            this._domRef = this.DDM.getElement(this.id);
+        }
+
+        return this._domRef;
+    },
+
+    /**
+     * Returns a reference to the actual element to drag.  By default this is
+     * the same as the html element, but it can be assigned to another
+     * element. An example of this can be found in YAHOO.util.DDProxy
+     *
+     * @return {Object} the html element
+     */
+    getDragEl: function() {
+        return this.DDM.getElement(this.dragElId);
+    },
+
+    /**
+     * Sets up the DragDrop object.  Must be called in the constructor of any
+     * YAHOO.util.DragDrop subclass
+     *
+     * @param id the id of the linked element
+     * @param {String} sGroup the group of related items
+     * element is supposed to be a target only, set to false.
+     */
+    init: function(id, sGroup) {
+        this.initTarget(id, sGroup);
+        YAHOO.util.Event.addListener(id, "mousedown",
+                                          this.handleMouseDown, this, true);
+    },
+
+    /**
+     * Initializes Targeting functionality only... the object does not
+     * get a mousedown handler.
+     *
+     * @param id the id of the linked element
+     * @param {String} sGroup the group of related items
+     * element is supposed to be a target only, set to false.
+     */
+    initTarget: function(id, sGroup) {
+
+        // create a local reference to the drag and drop manager
+        this.DDM = YAHOO.util.DDM;
+
+        // create a logger instance
+        this.logger = new ygLogger("DragDrop");
+
+        // set the default padding
+        this.padding = [0, 0, 0, 0];
+
+        // initialize the groups array
+        this.groups = {};
+
+        // set the id
+        this.id = id;
+
+        // the element is a drag handle by default
+        this.setDragElId(id);
+
+        // by default, clicked anchors will not start drag operations
+        this.invalidHandleTypes = {a : "a"};
+
+        // We don't want to register this as the handle with the manager
+        // so we just set the id rather than calling the setter
+        this.handleElId = id;
+
+        // cache the position of the element if we can
+        if (document && document.body) {
+            this.setInitPosition();
+        }
+
+        // add to an interaction group
+        this.addToGroup((sGroup) ? sGroup : "default");
+
+    },
+
+    /**
+     * Configures the padding for the target zone in px.  Effectively expands
+     * (or reduces) the virtual object size for targeting calculations.
+     * Supports css-style shorthand; if only one parameter is passed, all sides
+     * will have that padding, and if only two are passed, the top and bottom
+     * will have the first param, the left and right the second.
+     * @param {int} iTop    Top pad
+     * @param {int} iRight  Right pad
+     * @param {int} iBot    Bot pad
+     * @param {int} iLeft   Left pad
+     */
+    setPadding: function(iTop, iRight, iBot, iLeft) {
+        // this.padding = [iLeft, iRight, iTop, iBot];
+        if (!iRight && 0 !== iRight) {
+            this.padding = [iTop, iTop, iTop, iTop];
+        } else if (!iBot && 0 !== iBot) {
+            this.padding = [iTop, iRight, iTop, iRight];
+        } else {
+            this.padding = [iTop, iRight, iBot, iLeft];
+        }
+    },
+
+    /**
+     * Stores the initial placement of the dd element
+     */
+    setInitPosition: function(diffX, diffY) {
+        var el = this.getEl();
+
+        if (!this.DDM.verifyEl(el)) {
+            this.logger.debug(this.id + " element is broken");
+            return;
+        }
+
+        var dx = diffX || 0;
+        var dy = diffY || 0;
+
+        var p = YAHOO.util.Dom.getXY( el );
+
+        this.initPageX = p[0] - dx;
+        this.initPageY = p[1] - dy;
+
+        this.lastPageX = p[0];
+        this.lastPageY = p[1];
+
+        this.setStartPosition(p);
+    },
+
+    /**
+     * Sets the start position of the element.  This is set when the obj
+     * is initialized, the reset when a drag is started.
+     * @param pos current position (from previous lookup)
+     * @private
+     */
+    setStartPosition: function(pos) {
+
+        var p = pos || YAHOO.util.Dom.getXY( this.getEl() );
+
+        this.startPageX = p[0];
+        this.startPageY = p[1];
+    },
+
+    /**
+     * Add this instance to a group of related drag/drop objects.  All
+     * instances belong to at least one group, and can belong to as many
+     * groups as needed.
+     *
+     * @param sGroup {string} the name of the group
+     */
+    addToGroup: function(sGroup) {
+        this.groups[sGroup] = true;
+        this.DDM.regDragDrop(this, sGroup);
+    },
+
+    /**
+     * Allows you to specify that an element other than the linked element
+     * will be moved with the cursor during a drag
+     *
+     * @param id the id of the element that will be used to initiate the drag
+     */
+    setDragElId: function(id) {
+        this.dragElId = id;
+    },
+
+    /**
+     * Allows you to specify a child of the linked element that should be
+     * used to initiate the drag operation.  An example of this would be if
+     * you have a content div with text and links.  Clicking anywhere in the
+     * content area would normally start the drag operation.  Use this method
+     * to specify that an element inside of the content div is the element
+     * that starts the drag operation.
+     *
+     * @param id the id of the element that will be used to initiate the drag
+     */
+    setHandleElId: function(id) {
+        this.handleElId = id;
+        this.DDM.regHandle(this.id, id);
+    },
+
+    /**
+     * Allows you to set an element outside of the linked element as a drag
+     * handle
+     */
+    setOuterHandleElId: function(id) {
+        this.logger.debug("Adding outer handle event: " + id);
+        YAHOO.util.Event.addListener(id, "mousedown",
+                this.handleMouseDown, this, true);
+        this.setHandleElId(id);
+    },
+
+    /**
+     * Remove all drag and drop hooks for this element
+     */
+    unreg: function() {
+        this.logger.debug("DragDrop obj cleanup " + this.id);
+        YAHOO.util.Event.removeListener(this.id, "mousedown",
+                this.handleMouseDown);
+        this._domRef = null;
+        this.DDM._remove(this);
+    },
+
+    /**
+     * Returns true if this instance is locked, or the drag drop mgr is locked
+     * (meaning that all drag/drop is disabled on the page.)
+     *
+     * @return {boolean} true if this obj or all drag/drop is locked, else
+     * false
+     */
+    isLocked: function() {
+        return (this.DDM.isLocked() || this.locked);
+    },
+
+    /**
+     * Fired when this object is clicked
+     *
+     * @param {Event} e
+     * @param {YAHOO.util.DragDrop} oDD the clicked dd object (this dd obj)
+     * @private
+     */
+    handleMouseDown: function(e, oDD) {
+
+        this.logger.debug("isLocked: " + this.isLocked());
+
+        var EU = YAHOO.util.Event;
+
+
+        var button = e.which || e.button;
+        this.logger.debug("button: " + button);
+
+        if (this.primaryButtonOnly && button > 1) {
+            this.logger.debug("Mousedown was not produced by the primary button");
+            return;
+        }
+
+        if (this.isLocked()) {
+            this.logger.debug("Drag and drop is disabled, aborting");
+            return;
+        }
+
+        this.logger.debug("mousedown " + this.id);
+
+        this.DDM.refreshCache(this.groups);
+
+        // Only process the event if we really clicked within the linked
+        // element.  The reason we make this check is that in the case that
+        // another element was moved between the clicked element and the
+        // cursor in the time between the mousedown and mouseup events. When
+        // this happens, the element gets the next mousedown event
+        // regardless of where on the screen it happened.
+        var pt = new YAHOO.util.Point(EU.getPageX(e), EU.getPageY(e));
+        if ( this.DDM.isOverTarget(pt, this) )  {
+
+            this.logger.debug("click is legit");
+
+            //  check to see if the handle was clicked
+            var srcEl = EU.getTarget(e);
+
+            if (this.isValidHandleChild(srcEl) &&
+                    (this.id == this.handleElId ||
+                     this.DDM.handleWasClicked(srcEl, this.id)) ) {
+
+                // set the initial element position
+                this.setStartPosition();
+
+                this.logger.debug("firing onMouseDown events");
+
+
+                this.b4MouseDown(e);
+                this.onMouseDown(e);
+                this.DDM.handleMouseDown(e, this);
+
+                this.DDM.stopEvent(e);
+            }
+        }
+    },
+
+    /**
+     * Allows you to specify a tag name that should not start a drag operation
+     * when clicked.  This is designed to facilitate embedding links within a
+     * drag handle that do something other than start the drag.
+     *
+     * @param {string} tagName the type of element to exclude
+     */
+    addInvalidHandleType: function(tagName) {
+        var type = tagName.toUpperCase();
+        this.invalidHandleTypes[type] = type;
+    },
+
+    /**
+     * Unsets an excluded tag name set by addInvalidHandleType
+     *
+     * @param {string} tagName the type of element to unexclude
+     */
+    removeInvalidHandleType: function(tagName) {
+        var type = tagName.toUpperCase();
+        this.invalidHandleTypes[type] = null;
+    },
+
+    /**
+     * Checks the tag exclusion list to see if this click should be ignored
+     *
+     * @param {ygNode} node
+     * @return {boolean} true if this is a valid tag type, false if not
+     */
+    isValidHandleChild: function(node) {
+        var type = node.nodeName;
+
+        if (type == "#text") {
+            // this.logger.debug("text node, getting parent node type");
+            type = node.parentNode.nodeName;
+        }
+
+        return (!this.invalidHandleTypes[type]);
+    },
+
+    /**
+     * Create the array of horizontal tick marks if an interval was specified
+     * in setXConstraint().
+     *
+     * @private
+     */
+    setXTicks: function(iStartX, iTickSize) {
+        this.xTicks = [];
+        this.xTickSize = iTickSize;
+
+        var tickMap = {};
+
+        for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
+            if (!tickMap[i]) {
+                this.xTicks[this.xTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
+            if (!tickMap[i]) {
+                this.xTicks[this.xTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        this.xTicks.sort(this.DDM.numericSort) ;
+        this.logger.debug("xTicks: " + this.xTicks.join());
+    },
+
+    /**
+     * Create the array of vertical tick marks if an interval was specified in
+     * setYConstraint().
+     *
+     * @private
+     */
+    setYTicks: function(iStartY, iTickSize) {
+        this.yTicks = [];
+        this.yTickSize = iTickSize;
+
+        var tickMap = {};
+
+        for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
+            if (!tickMap[i]) {
+                this.yTicks[this.yTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
+            if (!tickMap[i]) {
+                this.yTicks[this.yTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        this.yTicks.sort(this.DDM.numericSort) ;
+        this.logger.debug("yTicks: " + this.yTicks.join());
+    },
+
+    /**
+     * By default, the element can be dragged any place on the screen.  Use
+     * this method to limit the horizontal travel of the element.  Pass in
+     * 0,0 for the parameters if you want to lock the drag to the y axis.
+     *
+     * @param {int} iLeft the number of pixels the element can move to the left
+     * @param {int} iRight the number of pixels the element can move to the
+     * right
+     * @param {int} iTickSize optional parameter for specifying that the
+     * element
+     * should move iTickSize pixels at a time.
+     */
+    setXConstraint: function(iLeft, iRight, iTickSize) {
+        this.leftConstraint = iLeft;
+        this.rightConstraint = iRight;
+
+        this.minX = this.initPageX - iLeft;
+        this.maxX = this.initPageX + iRight;
+        if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
+
+        this.constrainX = true;
+        this.logger.debug("initPageX:" + this.initPageX + " minX:" + this.minX +
+                " maxX:" + this.maxX);
+    },
+
+    /**
+     * By default, the element can be dragged any place on the screen.  Set
+     * this to limit the vertical travel of the element.  Pass in 0,0 for the
+     * parameters if you want to lock the drag to the x axis.
+     *
+     * @param {int} iUp the number of pixels the element can move up
+     * @param {int} iDown the number of pixels the element can move down
+     * @param {int} iTickSize optional parameter for specifying that the
+     * element should move iTickSize pixels at a time.
+     */
+    setYConstraint: function(iUp, iDown, iTickSize) {
+        this.topConstraint = iUp;
+        this.bottomConstraint = iDown;
+
+        this.minY = this.initPageY - iUp;
+        this.maxY = this.initPageY + iDown;
+        if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
+
+        this.constrainY = true;
+
+        this.logger.debug("initPageY:" + this.initPageY + " minY:" + this.minY +
+                " maxY:" + this.maxY);
+    },
+
+    /**
+     * resetConstraints must be called if you manually reposition a dd element.
+     * @param {boolean} maintainOffset
+     */
+    resetConstraints: function() {
+
+        // this.logger.debug("init pagexy: " + this.initPageX + ", " +
+        //      this.initPageY);
+        // this.logger.debug("last pagexy: " + this.lastPageX + ", " +
+        //      this.lastPageY);
+
+        // figure out how much this thing has moved
+        var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
+        var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
+
+        // this.logger.debug("diff: " + dx + ", " + dy);
+
+        // reset the initial location
+        this.setInitPosition(dx, dy);
+
+        if (this.constrainX) {
+            this.setXConstraint( this.leftConstraint,
+                                 this.rightConstraint,
+                                 this.xTickSize        );
+        }
+
+        if (this.constrainY) {
+            this.setYConstraint( this.topConstraint,
+                                 this.bottomConstraint,
+                                 this.yTickSize         );
+        }
+    },
+
+    /**
+     * Normally the drag element is moved pixel by pixel, but we can specify
+     * that it move a number of pixels at a time.  This method resolves the
+     * location when we have it set up like this.
+     *
+     * @param {int} val where we want to place the object
+     * @param {int[]} tickArray sorted array of valid points
+     * @return {int} the closest tick
+     * @private
+     */
+    getTick: function(val, tickArray) {
+
+        if (!tickArray) {
+            // If tick interval is not defined, it is effectively 1 pixel,
+            // so we return the value passed to us.
+            return val;
+        } else if (tickArray[0] >= val) {
+            // The value is lower than the first tick, so we return the first
+            // tick.
+            return tickArray[0];
+        } else {
+            for (var i = 0; i < tickArray.length; ++i) {
+                var next = i + 1;
+                if (tickArray[next] && tickArray[next] >= val) {
+                    var diff1 = val - tickArray[i];
+                    var diff2 = tickArray[next] - val;
+                    return (diff2 > diff1) ? tickArray[i] : tickArray[next];
+                }
+            }
+
+            // The value is larger than the last tick, so we return the last
+            // tick.
+            return tickArray[tickArray.length - 1];
+        }
+    },
+
+    /**
+     * toString method
+     * @return {string} string representation of the dd obj
+     */
+    toString: function(val, tickArray) {
+        return ("YAHOO.util.DragDrop {" + this.id + "}");
+    }
+
+};
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+// Only load the library once.  Rewriting the manager class would orphan
+// existing drag and drop instances.
+if (!YAHOO.util.DragDropMgr) {
+
+    /**
+     * @class Handles the element interaction for all DragDrop items in the
+     * window.  Generally, you will not call this class directly, but it does
+     * have helper methods that could be useful in your DragDrop
+     * implementations.  This class should not be instantiated; all methods
+     * are are static.
+     *
+     * @constructor
+     */
+    YAHOO.util.DragDropMgr = new function() {
+
+        /**
+         * utility package shorthand
+         * @private
+         */
+        var UTIL = YAHOO.util;
+
+        /**
+         * Two dimensional Array of registered DragDrop objects.  The first
+         * dimension is the DragDrop item group, the second the DragDrop
+         * object.
+         *
+         * @private
+         */
+        this.ids = {};
+
+        /**
+         * Array of element ids defined as drag handles.  Used to determine
+         * if the element that generated the mousedown event is actually the
+         * handle and not the html element itself.
+         *
+         * @private
+         */
+        this.handleIds = {};
+
+        /**
+         * the DragDrop object that is currently being dragged
+         *
+         * @type DragDrop
+         * @private
+         **/
+        this.dragCurrent = null;
+
+        /**
+         * the DragDrop object(s) that are being hovered over
+         *
+         * @type Array
+         * @private
+         */
+        this.dragOvers = {};
+
+        /**
+         * @private
+         */
+        this.logger = null;
+
+        /**
+         * the X distance between the cursor and the object being dragged
+         *
+         * @type int
+         * @private
+         */
+        this.deltaX = 0;
+
+        /**
+         * the Y distance between the cursor and the object being dragged
+         *
+         * @type int
+         * @private
+         */
+        this.deltaY = 0;
+
+        /**
+         * Flag to determine if we should prevent the default behavior of the
+         * events we define. By default this is true, but this can be set to
+         * false if you need the default behavior (not recommended)
+         *
+         * @type boolean
+         */
+        this.preventDefault = true;
+
+        /**
+         * Flag to determine if we should stop the propagation of the events
+         * we generate. This is true by default but you may want to set it to
+         * false if the html element contains other features that require the
+         * mouse click.
+         *
+         * @type boolean
+         */
+        this.stopPropagation = true;
+
+        /**
+         * @private
+         */
+        this.initalized = false;
+
+        /**
+         * All drag and drop can be disabled.
+         *
+         * @private
+         */
+        this.locked = false;
+
+        /**
+         * Called the first time an element is registered.
+         *
+         * @private
+         */
+        this.init = function() {
+            this.logger = new ygLogger("DragDropMgr");
+        };
+
+        /**
+         * In point mode, drag and drop interaction is defined by the
+         * location of the cursor during the drag/drop
+         * @type int
+         */
+        this.POINT     = 0;
+
+        /**
+         * In intersect mode, drag and drop interactio nis defined by the
+         * overlap of two or more drag and drop objects.
+         * @type int
+         */
+        this.INTERSECT = 1;
+
+        /**
+         * The current drag and drop mode.  Default it point mode
+         * @type int
+         */
+        this.mode = this.POINT;
+
+        /**
+         * Runs method on all drag and drop objects
+         * @private
+         */
+        this._execOnAll = function(sMethod, args) {
+            for (var i in this.ids) {
+                for (var j in this.ids[i]) {
+                    var oDD = this.ids[i][j];
+                    if (! this.isTypeOfDD(oDD)) {
+                        continue;
+                    }
+                    oDD[sMethod].apply(oDD, args);
+                }
+            }
+        };
+
+        /**
+         * Drag and drop initialization.  Sets up the global event handlers
+         * @private
+         */
+        this._onLoad = function() {
+
+            this._execOnAll("setInitPosition", []);
+
+            this.logger = new ygLogger("DragDropMgr");
+            this.logger.debug("DDM onload");
+
+            var EU = UTIL.Event;
+
+            EU.addListener(document, "mouseup",   this.handleMouseUp, this, true);
+            EU.addListener(document, "mousemove", this.handleMouseMove, this, true);
+            EU.addListener(window,   "unload",    this._onUnload, this, true);
+            EU.addListener(window,   "resize",    this._onResize, this, true);
+            // EU.addListener(window,   "mouseout",    this._test);
+
+            this.initalized = true;
+
+        };
+
+        /**
+         * Reset constraints on all drag and drop objs
+         * @private
+         */
+        this._onResize = function(e) {
+            this.logger.debug("window resize");
+            this._execOnAll("resetConstraints", []);
+        };
+
+        /**
+         * Lock all drag and drop functionality
+         */
+        this.lock = function() { this.locked = true; };
+
+        /**
+         * Unlock all drag and drop functionality
+         */
+        this.unlock = function() { this.locked = false; };
+
+        /**
+         * Is drag and drop locked?
+         *
+         * @return {boolean} True if drag and drop is locked, false otherwise.
+         */
+        this.isLocked = function() { return this.locked; };
+
+        /**
+         * Location cache that is set for all drag drop objects when a drag is
+         * initiated, cleared when the drag is finished.
+         *
+         * @private
+         */
+        this.locationCache = {};
+
+        /**
+         * Set useCache to false if you want to force object the lookup of each
+         * drag and drop linked element constantly during a drag.
+         * @type boolean
+         */
+        this.useCache = true;
+
+        /**
+         * The number of pixels that the mouse needs to move after the
+         * mousedown before the drag is initiated.  Default=3;
+         * @type int
+         */
+        this.clickPixelThresh = 3;
+
+        /**
+         * The number of milliseconds after the mousedown event to initiate the
+         * drag if we don't get a mouseup event. Default=1000
+         * @type int
+         */
+        this.clickTimeThresh = 1000;
+
+        /**
+         * Flag that indicates that either the drag pixel threshold or the
+         * mousdown time threshold has been met
+         * @type boolean
+         * @private
+         */
+        this.dragThreshMet = false;
+
+        /**
+         * Timeout used for the click time threshold
+         * @type Object
+         * @private
+         */
+        this.clickTimeout = null;
+
+        /**
+         * The X position of the mousedown event stored for later use when a
+         * drag threshold is met.
+         * @type int
+         * @private
+         */
+        this.startX = 0;
+
+        /**
+         * The Y position of the mousedown event stored for later use when a
+         * drag threshold is met.
+         * @type int
+         * @private
+         */
+        this.startY = 0;
+
+        /**
+         * Each DragDrop instance must be registered with the DragDropMgr.
+         * This is executed in ygDragDrop.init()
+         *
+         * @param {DragDrop} oDD the DragDrop object to register
+         * @param {String} sGroup the name of the group this element belongs to
+         */
+        this.regDragDrop = function(oDD, sGroup) {
+            if (!this.initialized) { this.init(); }
+
+            if (!this.ids[sGroup]) {
+                this.ids[sGroup] = {};
+            }
+            this.ids[sGroup][oDD.id] = oDD;
+        };
+
+        /**
+         * Unregisters a drag and drop item.  This is executed in
+         * ygDragDrop.unreg, use that method instead of calling this directly.
+         * @private
+         */
+        this._remove = function(oDD) {
+            for (var g in oDD.groups) {
+                if (g && this.ids[g][oDD.id]) {
+                    delete this.ids[g][oDD.id];
+                }
+            }
+            delete this.handleIds[oDD.id];
+        };
+
+        /**
+         * Each DragDrop handle element must be registered.  This is done
+         * automatically when executing ygDragDrop.setHandleElId()
+         *
+         * @param {String} sDDId the DragDrop id this element is a handle for
+         * @param {String} sHandleId the id of the element that is the drag
+         * handle
+         */
+        this.regHandle = function(sDDId, sHandleId) {
+            if (!this.handleIds[sDDId]) {
+                this.handleIds[sDDId] = {};
+            }
+            this.handleIds[sDDId][sHandleId] = sHandleId;
+        };
+
+        /**
+         * Utility function to determine if a given element has been
+         * registered as a drag drop item.
+         *
+         * @param {String} id the element id to check
+         * @return {boolean} true if this element is a DragDrop item,
+         * false otherwise
+         */
+        this.isDragDrop = function(id) {
+            return ( this.getDDById(id) ) ? true : false;
+        };
+
+        /**
+         * Returns the drag and drop instances that are in all groups the
+         * passed in instance belongs to.
+         *
+         * @param {ygDragDrop} p_oDD the obj to get related data for
+         * @param {boolean} bTargetsOnly if true, only return targetable objs
+         * @return {ygDragDrop[]} the related instances
+         */
+        this.getRelated = function(p_oDD, bTargetsOnly) {
+            var oDDs = [];
+            for (var i in p_oDD.groups) {
+                for (j in this.ids[i]) {
+                    var dd = this.ids[i][j];
+                    if (! this.isTypeOfDD(dd)) {
+                        continue;
+                    }
+                    if (!bTargetsOnly || dd.isTarget) {
+                        oDDs[oDDs.length] = dd;
+                    }
+                }
+            }
+
+            return oDDs;
+        };
+
+        /**
+         * Returns true if the specified dd target is a legal target for
+         * the specifice drag obj
+         *
+         * @param {ygDragDrop} the drag obj
+         * @param {ygDragDrop) the target
+         * @return {boolean} true if the target is a legal target for the
+         * dd obj
+         */
+        this.isLegalTarget = function (oDD, oTargetDD) {
+            var targets = this.getRelated(oDD);
+            for (var i =0;i<targets.length;++i) {
+                if (targets[i].id == oTargetDD.id) {
+                    return true;
+                }
+            }
+
+            return false;
+        };
+
+        /**
+         * My goal is to be able to transparently determine if an object is
+         * typeof ygDragDrop, and the exact subclass of ygDragDrop.  typeof
+         * returns "object", oDD.constructor.toString() always returns
+         * "ygDragDrop" and not the name of the subclass.  So for now it just
+         * evaluates a well-known variable in ygDragDrop.
+         *
+         * @param {Object} the object to evaluate
+         * @return {boolean} true if typeof oDD = ygDragDrop
+         */
+        this.isTypeOfDD = function (oDD) {
+            return (oDD && oDD.__ygDragDrop);
+        };
+
+        /**
+         * Utility function to determine if a given element has been
+         * registered as a drag drop handle for the given Drag Drop object.
+         *
+         * @param {String} id the element id to check
+         * @return {boolean} true if this element is a DragDrop handle, false
+         * otherwise
+         */
+        this.isHandle = function(sDDId, sHandleId) {
+            return ( this.handleIds[sDDId] &&
+                            this.handleIds[sDDId][sHandleId] );
+        };
+
+        /**
+         * Returns the DragDrop instance for a given id
+         *
+         * @param {String} id the id of the DragDrop object
+         * @return {DragDrop} the drag drop object, null if it is not found
+         */
+        this.getDDById = function(id) {
+            for (var i in this.ids) {
+                if (this.ids[i][id]) {
+                    return this.ids[i][id];
+                }
+            }
+            return null;
+        };
+
+        /**
+         * Fired after a registered DragDrop object gets the mousedown event.
+         * Sets up the events required to track the object being dragged
+         *
+         * @param {Event} e the event
+         * @param oDD the DragDrop object being dragged
+         * @private
+         */
+        this.handleMouseDown = function(e, oDD) {
+            this.logger.debug("mousedown - adding event handlers");
+            this.dragCurrent = oDD;
+
+            var el = oDD.getEl();
+
+            // track start position
+            this.startX = UTIL.Event.getPageX(e);
+            this.startY = UTIL.Event.getPageY(e);
+
+            this.deltaX = this.startX - el.offsetLeft;
+            this.deltaY = this.startY - el.offsetTop;
+
+            this.dragThreshMet = false;
+
+            this.clickTimeout = setTimeout(
+               "var DDM=YAHOO.util.DDM;DDM.startDrag(DDM.startX, DDM.startY)",
+               this.clickTimeThresh );
+        };
+
+        /**
+         * Fired when either the drag pixel threshol or the mousedown hold
+         * time threshold has been met.
+         *
+         * @param x {int} the X position of the original mousedown
+         * @param y {int} the Y position of the original mousedown
+         */
+        this.startDrag = function(x, y) {
+            this.logger.debug("firing drag start events");
+            clearTimeout(this.clickTimeout);
+            if (this.dragCurrent) {
+                this.dragCurrent.b4StartDrag(x, y);
+                this.dragCurrent.startDrag(x, y);
+            }
+            this.dragThreshMet = true;
+        };
+
+        /**
+         * Internal function to handle the mouseup event.  Will be invoked
+         * from the context of the document.
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.handleMouseUp = function(e) {
+
+            if (! this.dragCurrent) {
+                return;
+            }
+
+            clearTimeout(this.clickTimeout);
+
+            if (this.dragThreshMet) {
+                this.logger.debug("mouseup detected - completing drag");
+                this.fireEvents(e, true);
+            } else {
+                this.logger.debug("drag threshold not met");
+            }
+
+            this.stopDrag(e);
+
+            this.stopEvent(e);
+        };
+
+        /**
+         * Utility to stop event propagation and event default, if these
+         * features are turned on.
+         *
+         * @param {Event} e the event as returned by this.getEvent()
+         */
+        this.stopEvent = function(e) {
+            if (this.stopPropagation) {
+                UTIL.Event.stopPropagation(e);
+            }
+
+            if (this.preventDefault) {
+                UTIL.Event.preventDefault(e);
+            }
+        };
+
+        /**
+         * Internal function to clean up event handlers after the drag
+         * operation is complete
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.stopDrag = function(e) {
+            // this.logger.debug("mouseup - removing event handlers");
+
+            // Fire the drag end event for the item that was dragged
+            if (this.dragCurrent) {
+                if (this.dragThreshMet) {
+                    this.logger.debug("firing endDrag events");
+                    this.dragCurrent.b4EndDrag(e);
+                    this.dragCurrent.endDrag(e);
+                }
+
+                this.logger.debug("firing onMouseUp event");
+                this.dragCurrent.onMouseUp(e);
+            }
+
+            this.dragCurrent = null;
+            this.dragOvers = {};
+        };
+
+
+        /**
+         * Internal function to handle the mousemove event.  Will be invoked
+         * from the context of the html element.
+         *
+         * @TODO figure out what we can do about mouse events lost when the
+         * user drags objects beyond the window boundary.  Currently we can
+         * detect this in internet explorer by verifying that the mouse is
+         * down during the mousemove event.  Firefox doesn't give us the
+         * button state on the mousemove event.
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.handleMouseMove = function(e) {
+            if (! this.dragCurrent) {
+                // this.logger.debug("no current drag obj");
+                return;
+            }
+
+            // var button = e.which || e.button;
+
+            this.logger.debug("which: " + e.which + ", button: "+ e.button);
+
+
+            // check for IE mouseup outside of page boundary
+            if (UTIL.Event.isIE && !e.button) {
+                this.stopEvent(e);
+                return this.handleMouseUp(e);
+                // this.logger.debug("button failure");
+            }
+
+            if (!this.dragThreshMet) {
+                var diffX = Math.abs(this.startX - UTIL.Event.getPageX(e));
+                var diffY = Math.abs(this.startY - UTIL.Event.getPageY(e));
+                // this.logger.debug("diffX: " + diffX + "diffY: " + diffY);
+                if (diffX > this.clickPixelThresh ||
+                            diffY > this.clickPixelThresh) {
+                    this.logger.debug("pixel threshold met");
+                    this.startDrag(this.startX, this.startY);
+                }
+            }
+
+            if (this.dragThreshMet) {
+                this.dragCurrent.b4Drag(e);
+                this.dragCurrent.onDrag(e);
+                this.fireEvents(e, false);
+            }
+
+            this.stopEvent(e);
+        };
+
+        /**
+         * Iterates over all of the DragDrop elements to find ones we are
+         * hovering over or dropping on
+         *
+         * @param {Event} e the event
+         * @param {boolean} isDrop is this a drop op or a mouseover op?
+         * @private
+         */
+        this.fireEvents = function(e, isDrop) {
+            var dc = this.dragCurrent;
+
+            // If the user did the mouse up outside of the window, we could
+            // get here even though we have ended the drag.
+            if (!dc || dc.isLocked()) {
+                return;
+            }
+
+            var x = UTIL.Event.getPageX(e);
+            var y = UTIL.Event.getPageY(e);
+            var pt = new YAHOO.util.Point(x,y);
+
+            // cache the previous dragOver array
+            var oldOvers = [];
+
+            var outEvts   = [];
+            var overEvts  = [];
+            var dropEvts  = [];
+            var enterEvts = [];
+
+            // Check to see if the object we were hovering over is no longer
+            // being hovered over so we can fire the onDragOut event
+            for (var i in this.dragOvers) {
+
+                var ddo = this.dragOvers[i];
+
+                if (! this.isTypeOfDD(ddo)) {
+                    continue;
+                }
+
+                if (! this.isOverTarget(pt, ddo, this.mode)) {
+                    outEvts.push( ddo );
+                }
+
+                oldOvers[i] = true;
+                delete this.dragOvers[i];
+            }
+
+            for (var sGroup in dc.groups) {
+                // this.logger.debug("Processing group " + sGroup);
+
+                if ("string" != typeof sGroup) {
+                    continue;
+                }
+
+                for (i in this.ids[sGroup]) {
+                    var oDD = this.ids[sGroup][i];
+                    if (! this.isTypeOfDD(oDD)) {
+                        continue;
+                    }
+
+                    if (oDD.isTarget && !oDD.isLocked() && oDD != dc) {
+                        if (this.isOverTarget(pt, oDD, this.mode)) {
+                            // look for drop interactions
+                            if (isDrop) {
+                                dropEvts.push( oDD );
+                            // look for drag enter and drag over interactions
+                            } else {
+
+                                // initial drag over: dragEnter fires
+                                if (!oldOvers[oDD.id]) {
+                                    enterEvts.push( oDD );
+                                // subsequent drag overs: dragOver fires
+                                } else {
+                                    overEvts.push( oDD );
+                                }
+
+                                this.dragOvers[oDD.id] = oDD;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (this.mode) {
+                if (outEvts.length > 0) {
+                    dc.b4DragOut(e, outEvts);
+                    dc.onDragOut(e, outEvts);
+                }
+
+                if (enterEvts.length > 0) {
+                    dc.onDragEnter(e, enterEvts);
+                }
+
+                if (overEvts.length > 0) {
+                    dc.b4DragOver(e, overEvts);
+                    dc.onDragOver(e, overEvts);
+                }
+
+                if (dropEvts.length > 0) {
+                    dc.b4DragDrop(e, dropEvts);
+                    dc.onDragDrop(e, dropEvts);
+                }
+
+            } else {
+                // fire dragout events
+                for (i=0; i < outEvts.length; ++i) {
+                    this.logger.debug(dc.id+" onDragOut: " + outEvts[i].id);
+                    dc.b4DragOut(e, outEvts[i].id);
+                    dc.onDragOut(e, outEvts[i].id);
+                }
+
+                // fire enter events
+                for (i=0; i < enterEvts.length; ++i) {
+                    this.logger.debug(dc.id + " dragEnter " + enterEvts[i].id);
+                    // dc.b4DragEnter(e, oDD.id);
+                    dc.onDragEnter(e, enterEvts[i].id);
+                }
+
+                // fire over events
+                for (i=0; i < overEvts.length; ++i) {
+                    this.logger.debug(dc.id + " dragOver " + overEvts[i].id);
+                    dc.b4DragOver(e, overEvts[i].id);
+                    dc.onDragOver(e, overEvts[i].id);
+                }
+
+                // fire drop events
+                for (i=0; i < dropEvts.length; ++i) {
+                    this.logger.debug(dc.id + " dragDrop " + dropEvts[i].id);
+                    dc.b4DragDrop(e, dropEvts[i].id);
+                    dc.onDragDrop(e, dropEvts[i].id);
+                }
+
+            }
+
+        };
+
+        /**
+         * Helper function for getting the best match from the list of drag
+         * and drop objects returned by the drag and drop events when we are
+         * in INTERSECT mode.  It returns either the first object that the
+         * cursor is over, or the object that has the greatest overlap with
+         * the dragged element.
+         *
+         * @param  {ygDragDrop[]} dds The array of drag and drop objects
+         * targeted
+         * @return {ygDragDrop}       The best single match
+         */
+        this.getBestMatch = function(dds) {
+            var winner = null;
+            // Return null if the input is not what we expect
+            //if (!dds || !dds.length || dds.length == 0) {
+               // winner = null;
+            // If there is only one item, it wins
+            //} else if (dds.length == 1) {
+
+            if (dds.length == 1) {
+                winner = dds[0];
+            } else {
+                // Loop through the targeted items
+                for (var i=0; i<dds.length; ++i) {
+                    var dd = dds[i];
+                    // If the cursor is over the object, it wins.  If the
+                    // cursor is over multiple matches, the first one we come
+                    // to wins.
+                    if (dd.cursorIsOver) {
+                        winner = dd;
+                        break;
+                    // Otherwise the object with the most overlap wins
+                    } else {
+                        if (!winner ||
+                            winner.overlap.getArea() < dd.overlap.getArea()) {
+                            winner = dd;
+                        }
+                    }
+                }
+            }
+
+            return winner;
+        };
+
+        /**
+         * Refreshes the cache of the top-left and bottom-right points of the
+         * drag and drop objects in the specified groups
+         *
+         * @param {Array} aGroups an associative array of groups to refresh
+         */
+        this.refreshCache = function(aGroups) {
+            this.logger.debug("refreshing element location cache");
+            for (sGroup in aGroups) {
+                if ("string" != typeof sGroup) {
+                    continue;
+                }
+                for (i in this.ids[sGroup]) {
+                    var oDD = this.ids[sGroup][i];
+
+                    if (this.isTypeOfDD(oDD)) {
+                        var loc = this.getLocation(oDD);
+                        if (loc) {
+                            this.locationCache[oDD.id] = loc;
+                        } else {
+                            delete this.locationCache[oDD.id];
+                            this.logger.debug("something is wrong with the element");
+                            // this will unregister the drag and drop object if
+                            // the element is not in a usable state
+                            oDD.unreg();
+                        }
+                    }
+                }
+            }
+        };
+
+        /**
+         * This checks to make sure an element exists and is in the DOM.  The
+         * main purpose is to handle cases where innerHTML is used to remove
+         * drag and drop objects from the DOM.  IE provides an 'unspecified
+         * error' when trying to access the offsetParent of such an element
+         * @param {HTMLElement} el the element to check
+         * @return {boolean} true if the element looks usable
+         */
+        this.verifyEl = function(el) {
+            try {
+                if (el) {
+                    var parent = el.offsetParent;
+                    if (parent) {
+                        return true;
+                    }
+                }
+            } catch(e) {
+                this.logger.debug("detected problem with an element");
+            }
+
+            return false;
+        };
+
+        /**
+         * Returns the an array containing the drag and drop element's position
+         * and size, including the ygDragDrop.padding configured for it
+         *
+         * @param {ygDragDrop} oDD the drag and drop object to get the
+         * location for
+         * @return array containing the top left and bottom right points of the
+         * element
+         */
+        this.getLocation = function(oDD) {
+            if (! this.isTypeOfDD(oDD)) {
+                this.logger.debug(oDD + " is not a DD obj");
+                return null;
+            }
+
+            var el = oDD.getEl();
+
+            if (!this.verifyEl(el)) {
+                this.logger.debug(oDD + " element is not usable");
+                return null;
+            }
+
+            // this.logger.debug(oDD.id + " padding: " + oDD.padding);
+
+            // var aPos = ygPos.getPos(el);
+            var aPos = YAHOO.util.Dom.getXY(el);
+
+            x1 = aPos[0];
+            x2 = x1 + el.offsetWidth;
+
+            y1 = aPos[1];
+            y2 = y1 + el.offsetHeight;
+
+            var t = y1 - oDD.padding[0];
+            var r = x2 + oDD.padding[1];
+            var b = y2 + oDD.padding[2];
+            var l = x1 - oDD.padding[3];
+
+            return new YAHOO.util.Region( t, r, b, l );
+
+        };
+
+        /**
+         * Checks the cursor location to see if it over the target
+         *
+         * @param {YAHOO.util.Point} pt The point to evaluate
+         * @param {ygDragDrop} oDDTarget the DragDrop object we are inspecting
+         * @return {boolean} true if the mouse is over the target
+         * @private
+         */
+        this.isOverTarget = function(pt, oDDTarget, intersect) {
+            // use cache if available
+            var loc = this.locationCache[oDDTarget.id];
+            if (!loc || !this.useCache) {
+                this.logger.debug("cache not populated");
+                loc = this.getLocation(oDDTarget);
+                this.locationCache[oDDTarget.id] = loc;
+
+                this.logger.debug("cache: " + loc);
+            }
+
+            // this.logger.debug("isOverTarget: " + x + "," + y + ", " + loc);
+
+            // var cursorIsOver =  (x >= loc[3] && x <= loc[1] && y >= loc[0] && y <= loc[2]);
+            //oDDTarget.cursorIsOver = loc.contains( new YAHOO.util.Point(x, y) );
+            oDDTarget.cursorIsOver = loc.contains( pt );
+            oDDTarget.overlap = null;
+
+            // if (this.INTERSECT == this.mode) {
+            if (intersect) {
+
+                var curRegion =
+                    YAHOO.util.Region.getRegion(this.dragCurrent.getDragEl());
+                var overlap = curRegion.intersect(loc);
+
+                if (overlap) {
+                    oDDTarget.overlap = overlap;
+                    return true;
+                } else {
+                    return false;
+                }
+
+            } else {
+                return oDDTarget.cursorIsOver;
+            }
+        };
+
+        /**
+         * @private
+         */
+        this._onUnload = function(e, me) {
+            this.unregAll();
+        };
+
+        /**
+         * Cleans up the drag and drop events and objects.
+         *
+         * @private
+         */
+        this.unregAll = function() {
+            this.logger.debug("unregister all");
+
+            if (this.dragCurrent) {
+                this.stopDrag();
+                this.dragCurrent = null;
+            }
+
+            this._execOnAll("unreg", []);
+
+            for (i in this.elementCache) {
+                delete this.elementCache[i];
+            }
+
+            this.elementCache = {};
+            this.ids = {};
+        };
+
+        /**
+         * A cache of DOM elements
+         *
+         * @private
+         */
+        this.elementCache = {};
+
+        /**
+         * Get the wrapper for the DOM element specified
+         *
+         * @param {String} id the id of the elment to get
+         * @return {YAHOO.util.DDM.ElementWrapper} the wrapped element
+         * @private
+         */
+        this.getElWrapper = function(id) {
+            var oWrapper = this.elementCache[id];
+            if (!oWrapper || !oWrapper.el) {
+                // this.logger.debug("adding element cache: " + id);
+                oWrapper = this.elementCache[id] =
+                    new this.ElementWrapper(document.getElementById(id));
+            }
+            return oWrapper;
+        };
+
+        /**
+         * Returns the actual DOM element
+         *
+         * @param {String} id the id of the elment to get
+         * @return {Object} The element
+         */
+        this.getElement = function(id) {
+            // return this.getElWrapper(id).el;
+            return document.getElementById(id);
+        };
+
+        /**
+         * Returns the style property for the DOM element (i.e.,
+         * document.getElById(id).style)
+         *
+         * @param {String} id the id of the elment to get
+         * @return {Object} The style property of the element
+         */
+        this.getCss = function(id) {
+            // return this.getElWrapper(id).css;
+            var css = null;
+            var el = document.getElementById(id);
+            if (el) {
+                css = el.style;
+            }
+
+            return css;
+        };
+
+        /**
+         * Inner class for cached elements
+         */
+        this.ElementWrapper = function(el) {
+                /**
+                 * @private
+                 */
+                this.el = el || null;
+                /**
+                 * @private
+                 */
+                this.id = this.el && el.id;
+                /**
+                 * @private
+                 */
+                this.css = this.el && el.style;
+            };
+
+        /**
+         * Returns the X position of an html element
+         * @param el the element for which to get the position
+         * @return {int} the X coordinate
+         */
+        this.getPosX = function(el) {
+            return YAHOO.util.Dom.getX(el);
+        };
+
+        /**
+         * Returns the Y position of an html element
+         * @param el the element for which to get the position
+         * @return {int} the Y coordinate
+         */
+        this.getPosY = function(el) {
+            return YAHOO.util.Dom.getY(el);
+        };
+
+        /**
+         * Swap two nodes.  In IE, we use the native method, for others we
+         * emulate the IE behavior
+         *
+         * @param n1 the first node to swap
+         * @param n2 the other node to swap
+         */
+        this.swapNode = function(n1, n2) {
+            if (n1.swapNode) {
+                n1.swapNode(n2);
+            } else {
+                // the node reference order for the swap is a little tricky.
+                var p = n2.parentNode;
+                var s = n2.nextSibling;
+                n1.parentNode.replaceChild(n2,n1);
+                p.insertBefore(n1,s);
+            }
+        };
+
+        /**
+         * @private
+         */
+        this.getScroll = function () {
+            var t, l;
+            if (document.documentElement && document.documentElement.scrollTop) {
+                t = document.documentElement.scrollTop;
+                l = document.documentElement.scrollLeft;
+            } else if (document.body) {
+                t = document.body.scrollTop;
+                l = document.body.scrollLeft;
+            }
+            return { top: t, left: l };
+        };
+
+        /**
+         * Returns the specified element style property
+         * @param {HTMLElement} el          the element
+         * @param {string}      styleProp   the style property
+         * @return {string}     The value of the style property
+         */
+        this.getStyle = function(el, styleProp) {
+            if (el.style.styleProp) {
+                return el.style.styleProp;
+            } else if (el.currentStyle) {
+                return el.currentStyle[styleProp];
+            } else if (document.defaultView) {
+                return document.defaultView.getComputedStyle(el, null).
+                    getPropertyValue(styleProp);
+            }
+        };
+
+        /**
+         * Gets the scrollTop
+         *
+         * @return {int} the document's scrollTop
+         */
+        this.getScrollTop = function () { return this.getScroll().top; };
+
+        /**
+         * Gets the scrollLeft
+         *
+         * @return {int} the document's scrollTop
+         */
+        this.getScrollLeft = function () { return this.getScroll().left; };
+
+        this.moveToEl = function (moveEl, targetEl) {
+            var aCoord = YAHOO.util.Dom.getXY(targetEl);
+            this.logger.debug("moveToEl: " + aCoord);
+            YAHOO.util.Dom.setXY(moveEl, aCoord);
+        };
+
+        /**
+         * Gets the client height
+         *
+         * @return {int} client height in px
+         */
+        this.getClientHeight = function() {
+            return (window.innerHeight) ? window.innerHeight :
+                (document.documentElement && document.documentElement.clientHeight) ?
+                document.documentElement.clientHeight : document.body.offsetHeight;
+        };
+
+        /**
+         * Gets the client width
+         *
+         * @return {int} client width in px
+         */
+        this.getClientWidth = function() {
+            return (window.innerWidth) ? window.innerWidth :
+                (document.documentElement && document.documentElement.clientWidth) ?
+                document.documentElement.clientWidth : document.body.offsetWidth;
+        };
+
+        /**
+         * numeric array sort function
+         */
+        this.numericSort = function(a, b) { return (a - b); };
+
+        /**
+         * @private
+         */
+        this._timeoutCount = 0;
+
+        /**
+         * @private
+         * Trying to make the load order less important.  Without this we get
+         * an error if this file is loaded before the Event Utility.
+         */
+        this._addListeners = function() {
+            if ( UTIL.Event &&
+                 document          &&
+                 document.body        ) {
+
+                this._onLoad();
+            } else {
+                if (this._timeoutCount > 500) {
+                    this.logger.debug("DragDrop requires the Event Utility");
+                } else {
+                    setTimeout("YAHOO.util.DDM._addListeners()", 10);
+                    this._timeoutCount += 1;
+                }
+            }
+
+        };
+
+        /**
+         * Recursively searches the immediate parent and all child nodes for
+         * the handle element in order to determine wheter or not it was
+         * clicked.
+         *
+         * @param node the html element to inspect
+         */
+        this.handleWasClicked = function(node, id) {
+            if (this.isHandle(id, node.id)) {
+                this.logger.debug("clicked node is a handle");
+                return true;
+            } else {
+                // check to see if this is a text node child of the one we want
+                var p = node.parentNode;
+                // this.logger.debug("p: " + p);
+
+                while (p) {
+                    if (this.isHandle(id, p.id)) {
+                        return true;
+                    } else {
+                        this.logger.debug(p.id + " is not a handle");
+                        p = p.parentNode;
+                    }
+                }
+            }
+
+            return false;
+        };
+
+    };
+
+    // shorter alias, save a few bytes
+    YAHOO.util.DDM = YAHOO.util.DragDropMgr;
+    YAHOO.util.DDM._addListeners();
+
+}
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation where the linked element follows the
+ * mouse cursor.
+ *
+ * @extends DragDrop
+ * @constructor
+ * @param {String} id the id of the linked element
+ * @param {String} sGroup the group of related DragDrop items
+ */
+YAHOO.util.DD = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+        this.logger.setModuleName("DD");
+    }
+};
+
+YAHOO.util.DD.prototype = new YAHOO.util.DragDrop();
+
+/**
+ * Should we auto-scroll? Defaults to true
+ *
+ * @type boolean
+ */
+YAHOO.util.DD.prototype.scroll = true;
+
+/**
+ * Sets the pointer offset to the distance between the linked element's top
+ * left corner and the location the element was clicked
+ *
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ */
+YAHOO.util.DD.prototype.autoOffset = function(iPageX, iPageY) {
+    var el = this.getEl();
+    var aCoord = YAHOO.util.Dom.getXY(el);
+    var x = iPageX - aCoord[0];
+    var y = iPageY - aCoord[1];
+    this.setDelta(x, y);
+    this.logger.debug("autoOffset el pos: " + aCoord + ", delta: " + x + "," + y);
+};
+
+/**
+ * Sets the pointer offset.  You can call this directly to force the offset to
+ * be in a particular location (e.g., pass in 0,0 to set it to the center of the
+ * object, as done in ygDDSliderBG)
+ *
+ * @param {int} iDeltaX the distance from the left
+ * @param {int} iDeltaY the distance from the top
+ */
+YAHOO.util.DD.prototype.setDelta = function(iDeltaX, iDeltaY) {
+    this.deltaX = iDeltaX;
+    this.deltaY = iDeltaY;
+    this.logger.debug("deltaX:" + this.deltaX + ", deltaY:" + this.deltaY);
+};
+
+/**
+ * Sets the drag element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked.  Override this if you want to place the element in a
+ * location other than where the cursor is.
+ *
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+
+YAHOO.util.DD.prototype.setDragElPos = function(iPageX, iPageY) {
+    this.alignElWithMouse(this.getDragEl(), iPageX, iPageY);
+};
+
+/**
+ * Sets the element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked.  Override this if you want to place the element in a
+ * location other than where the cursor is.
+ *
+ * @param {HTMLElement} el the element to move
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+YAHOO.util.DD.prototype.alignElWithMouse = function(el, iPageX, iPageY) {
+    var oCoord = this.getTargetCoord(iPageX, iPageY);
+    var aCoord = [oCoord.x, oCoord.y];
+    // this.logger.debug("****alignElWithMouse : " + el.id + ", " + aCoord + ", " + el.style.display);
+    YAHOO.util.Dom.setXY(el, aCoord);
+
+    this.cachePosition(oCoord.x, oCoord.y);
+
+    this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
+};
+
+/**
+ * Saves the most recent position so that we can reset the constraints and
+ * tick marks on-demand.  We need to know this so that we can calculate the
+ * number of pixels the element is offset from its original position.
+ */
+YAHOO.util.DD.prototype.cachePosition = function(iPageX, iPageY) {
+    if (iPageX) {
+        this.lastPageX = iPageX;
+        this.lastPageY = iPageY;
+    } else {
+        var aCoord = YAHOO.util.Dom.getXY(this.getEl());
+        this.lastPageX = aCoord[0];
+        this.lastPageY = aCoord[1];
+    }
+};
+
+/**
+ * Auto-scroll the window if the dragged object has been moved beyond the
+ * visible window boundary.
+ *
+ * @param {int} x the drag element's x position
+ * @param {int} y the drag element's y position
+ * @param {int} h the height of the drag element
+ * @param {int} w the width of the drag element
+ * @private
+ */
+YAHOO.util.DD.prototype.autoScroll = function(x, y, h, w) {
+
+    if (this.scroll) {
+        // The client height
+        var clientH = this.DDM.getClientHeight();
+
+        // The client width
+        var clientW = this.DDM.getClientWidth();
+
+        // The amt scrolled down
+        var st = this.DDM.getScrollTop();
+
+        // The amt scrolled right
+        var sl = this.DDM.getScrollLeft();
+
+        // Location of the bottom of the element
+        var bot = h + y;
+
+        // Location of the right of the element
+        var right = w + x;
+
+        // The distance from the cursor to the bottom of the visible area,
+        // adjusted so that we don't scroll if the cursor is beyond the
+        // element drag constraints
+        var toBot = (clientH + st - y - this.deltaY);
+
+        // The distance from the cursor to the right of the visible area
+        var toRight = (clientW + sl - x - this.deltaX);
+
+        // this.logger.debug( " x: " + x + " y: " + y + " h: " + h +
+        // " clientH: " + clientH + " clientW: " + clientW +
+        // " st: " + st + " sl: " + sl + " bot: " + bot +
+        // " right: " + right + " toBot: " + toBot + " toRight: " + toRight);
+
+        // How close to the edge the cursor must be before we scroll
+        // var thresh = (document.all) ? 100 : 40;
+        var thresh = 40;
+
+        // How many pixels to scroll per autoscroll op.  This helps to reduce
+        // clunky scrolling. IE is more sensitive about this ... it needs this
+        // value to be higher.
+        var scrAmt = (document.all) ? 80 : 30;
+
+        // Scroll down if we are near the bottom of the visible page and the
+        // obj extends below the crease
+        if ( bot > clientH && toBot < thresh ) {
+            window.scrollTo(sl, st + scrAmt);
+        }
+
+        // Scroll up if the window is scrolled down and the top of the object
+        // goes above the top border
+        if ( y < st && st > 0 && y - st < thresh ) {
+            window.scrollTo(sl, st - scrAmt);
+        }
+
+        // Scroll right if the obj is beyond the right border and the cursor is
+        // near the border.
+        if ( right > clientW && toRight < thresh ) {
+            window.scrollTo(sl + scrAmt, st);
+        }
+
+        // Scroll left if the window has been scrolled to the right and the obj
+        // extends past the left border
+        if ( x < sl && sl > 0 && x - sl < thresh ) {
+            window.scrollTo(sl - scrAmt, st);
+        }
+    }
+};
+
+/**
+ * Finds the location the element should be placed if we want to move
+ * it to where the mouse location less the click offset would place us.
+ *
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ * @return an object that contains the coordinates (Object.x and Object.y)
+ * @private
+ */
+YAHOO.util.DD.prototype.getTargetCoord = function(iPageX, iPageY) {
+
+    // this.logger.debug("getTargetCoord: " + iPageX + ", " + iPageY);
+
+    var x = iPageX - this.deltaX;
+    var y = iPageY - this.deltaY;
+
+    if (this.constrainX) {
+        if (x < this.minX) { x = this.minX; }
+        if (x > this.maxX) { x = this.maxX; }
+    }
+
+    if (this.constrainY) {
+        if (y < this.minY) { y = this.minY; }
+        if (y > this.maxY) { y = this.maxY; }
+    }
+
+    x = this.getTick(x, this.xTicks);
+    y = this.getTick(y, this.yTicks);
+
+    // this.logger.debug("getTargetCoord " +
+            // " iPageX: " + iPageX +
+            // " iPageY: " + iPageY +
+            // " x: " + x + ", y: " + y);
+
+    return {x:x, y:y};
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DD.prototype.b4MouseDown = function(e) {
+    // this.resetConstraints();
+    this.autoOffset(YAHOO.util.Event.getPageX(e),
+                        YAHOO.util.Event.getPageY(e));
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DD.prototype.b4Drag = function(e) {
+    this.setDragElPos(YAHOO.util.Event.getPageX(e),
+                        YAHOO.util.Event.getPageY(e));
+};
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Debugging ygDragDrop events that can be overridden
+///////////////////////////////////////////////////////////////////////////////
+/*
+YAHOO.util.DD.prototype.startDrag = function(x, y) {
+    this.logger.debug(this.id.toString()  + " startDrag");
+};
+
+YAHOO.util.DD.prototype.onDrag = function(e) {
+    this.logger.debug(this.id.toString() + " onDrag");
+};
+
+YAHOO.util.DD.prototype.onDragEnter = function(e, id) {
+    this.logger.debug(this.id.toString() + " onDragEnter: " + id);
+};
+
+YAHOO.util.DD.prototype.onDragOver = function(e, id) {
+    this.logger.debug(this.id.toString() + " onDragOver: " + id);
+};
+
+YAHOO.util.DD.prototype.onDragOut = function(e, id) {
+    this.logger.debug(this.id.toString() + " onDragOut: " + id);
+};
+
+YAHOO.util.DD.prototype.onDragDrop = function(e, id) {
+    this.logger.debug(this.id.toString() + " onDragDrop: " + id);
+};
+
+YAHOO.util.DD.prototype.endDrag = function(e) {
+    this.logger.debug(this.id.toString() + " endDrag");
+};
+*/
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation that inserts an empty, bordered div into
+ * the document that follows the cursor during drag operations.  At the time of
+ * the click, the frame div is resized to the dimensions of the linked html
+ * element, and moved to the exact location of the linked element.
+ *
+ * @extends YAHOO.util.DD
+ * @constructor
+ * @param {String} id the id of the linked html element
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+YAHOO.util.DDProxy = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+        this.initFrame();
+        this.logger.setModuleName("DDProxy");
+    }
+};
+
+YAHOO.util.DDProxy.prototype = new YAHOO.util.DD();
+
+/**
+ * A reference to the one div element we create for all instances of this class
+ *
+ * @type Object
+ */
+YAHOO.util.DDProxy.frameDiv = null;
+
+/**
+ * the drag frame div id
+ *
+ * @type String
+ */
+YAHOO.util.DDProxy.dragElId = "ygddfdiv";
+
+/**
+ * The border width of the frame.  This is used when we resize the frame to
+ * the size of the linked element.  We substract the border width to make
+ * the div the correct size.
+ *
+ * @TODO find a better way to handle this
+ *
+ * @type int
+ */
+YAHOO.util.DDProxy.prototype.borderWidth = 2;
+
+/**
+ * By default we resize the drag frame to be the same size as the element
+ * we want to drag (this is to get the frame effect).  We can turn it off
+ * if we want a different behavior (ex: ygDDMy2)
+ *
+ * @type boolean
+ */
+YAHOO.util.DDProxy.prototype.resizeFrame = true;
+
+/**
+ * By default the frame is positioned exactly where the drag element is, so
+ * we use the cursor offset provided by YAHOO.util.DD.  Another option that works only if
+ * you do not have constraints on the obj is to have the drag frame centered
+ * around the cursor.  Set centerFrame to true for this effect.  Ex:
+ * ygDDMy2
+ *
+ * @type boolean
+ */
+YAHOO.util.DDProxy.prototype.centerFrame = false;
+
+/**
+ * Create the drag frame if needed
+ */
+YAHOO.util.DDProxy.createFrame = function() {
+    var THIS = YAHOO.util.DDProxy;
+
+    if (!document || !document.body) {
+        setTimeout(THIS.createFrame, 50);
+        return;
+    }
+
+    if (!THIS.frameDiv) {
+        THIS.frameDiv = document.createElement("div");
+        THIS.frameDiv.id = THIS.dragElId;
+        var s = THIS.frameDiv.style;
+        s.position = "absolute";
+        s.visibility = "hidden";
+        s.cursor = "move";
+        s.border = "2px solid #aaa";
+        s.zIndex = 999;
+
+        document.body.appendChild(THIS.frameDiv);
+    }
+};
+
+/**
+ * Initialization for the drag frame element.  Must be called in the
+ * constructor of all subclasses
+ */
+YAHOO.util.DDProxy.prototype.initFrame = function() {
+    YAHOO.util.DDProxy.createFrame();
+    this.setDragElId(YAHOO.util.DDProxy.dragElId);
+    this.useAbsMath = true;
+};
+
+/**
+ * Resizes the drag frame to the dimensions of the clicked object, positions
+ * it over the object, and finally displays it
+ *
+ * @param {int} iPageX X click position
+ * @param {int} iPageY Y click position
+ * @private
+ */
+YAHOO.util.DDProxy.prototype.showFrame = function(iPageX, iPageY) {
+    var el = this.getEl();
+
+    var s = this.getDragEl().style;
+
+    if (this.resizeFrame) {
+        s.width = (parseInt(el.offsetWidth) - (2*this.borderWidth)) + "px";
+        s.height = (parseInt(el.offsetHeight) - (2*this.borderWidth)) + "px";
+    }
+
+    if (this.centerFrame) {
+        this.setDelta(Math.round(parseInt(s.width)/2),
+                Math.round(parseInt(s.width)/2));
+    }
+
+    this.setDragElPos(iPageX, iPageY);
+
+    s.visibility = "";
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4MouseDown = function(e) {
+    var x = YAHOO.util.Event.getPageX(e);
+    var y = YAHOO.util.Event.getPageY(e);
+    this.autoOffset(x, y);
+    this.setDragElPos(x, y);
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4StartDrag = function(x, y) {
+    // show the drag frame
+    this.logger.debug("start drag show frame, x: " + x + ", y: " + y);
+    this.showFrame(x, y);
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4EndDrag = function(e) {
+    this.logger.debug(this.id + " b4EndDrag");
+
+    // hide the drag frame
+    var s = this.getDragEl().style;
+    s.visibility = "hidden";
+};
+
+// overrides YAHOO.util.DragDrop
+// By default we try to move the element to the last location of the frame.
+// This is so that the default behavior mirrors that of YAHOO.util.DD.
+YAHOO.util.DDProxy.prototype.endDrag = function(e) {
+    this.logger.debug(this.id + " endDrag");
+    var lel = this.getEl();
+    var del = this.getDragEl();
+
+    // Show the drag frame briefly so we can get its position
+    del.style.visibility = "";
+
+    // Hide the linked element before the move to get around a Safari
+    // rendering bug.
+    lel.style.visibility = "hidden";
+    YAHOO.util.DDM.moveToEl(lel, del);
+    del.style.visibility = "hidden";
+    lel.style.visibility = "";
+};
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation that does not move, but can be a drop
+ * target.  You would get the same result by simply omitting implementation
+ * for the event callbacks, but this way we reduce the processing cost of the
+ * event listener and the callbacks.
+ *
+ * @extends YAHOO.util.DragDrop
+ * @constructor
+ * @param {String} id the id of the element that is a drop target
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+
+YAHOO.util.DDTarget = function(id, sGroup) {
+    if (id) {
+        this.initTarget(id, sGroup);
+        this.logger.setModuleName("DDTarget");
+    }
+};
+
+YAHOO.util.DDTarget.prototype = new YAHOO.util.DragDrop();
+
diff --git a/web/build/dragdrop.js b/web/build/dragdrop.js
new file mode 100644
index 000000000..7d0e3e8ec
--- /dev/null
+++ b/web/build/dragdrop.js
@@ -0,0 +1,2426 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ * @class Defines the interface and base operation of items that that can be
+ * dragged or can be drop targets.  It was designed to be extended, overriding
+ * the event handlers for startDrag, onDrag, onDragOver, onDragOut.
+ * Up to three html elements can be associated with a DragDrop instance:
+ * <ul>
+ * <li>linked element: the element that is passed into the constructor.
+ * This is the element which defines the boundaries for interaction with
+ * other DragDrop objects.</li>
+ * <li>handle element(s): The drag operation only occurs if the element that
+ * was clicked matches a handle element.  By default this is the linked
+ * element, but there are times that you will want only a portion of the
+ * linked element to initiate the drag operation, and the setHandleElId()
+ * method provides a way to define this.</li>
+ * <li>drag element: this represents an the element that would be moved along
+ * with the cursor during a drag operation.  By default, this is the linked
+ * element itself as in {@link YAHOO.util.DD}.  setDragElId() lets you define
+ * a separate element that would be moved, as in {@link YAHOO.util.DDProxy}
+ * </li>
+ * </ul>
+ * This class should not be instantiated until the onload event to ensure that
+ * the associated elements are available.
+ * The following would define a DragDrop obj that would interact with any
+ * other * DragDrop obj in the "group1" group:
+ * <pre>
+ *  dd = new YAHOO.util.DragDrop("div1", "group1");
+ * </pre>
+ * Since none of the event handlers have been implemented, nothing would
+ * actually happen if you were to run the code above.  Normally you would
+ * override this class or one of the default implementations, but you can
+ * also override the methods you want on an instance of the class...
+ * <pre>
+ *  dd.onDragDrop = function(e, id) {
+ *   alert("dd was dropped on " + id);
+ *  }
+ * </pre>
+ * @constructor
+ * @param {String} id of the element that is linked to this instance
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+YAHOO.util.DragDrop = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+    }
+};
+
+YAHOO.util.DragDrop.prototype = {
+
+    /**
+     * The id of the element associated with this object.  This is what we
+     * refer to as the "linked element" because the size and position of
+     * this element is used to determine when the drag and drop objects have
+     * interacted.
+     *
+     * @type String
+     */
+    id: null,
+
+    /**
+     * The id of the element that will be dragged.  By default this is same
+     * as the linked element , but could be changed to another element. Ex:
+     * YAHOO.util.DDProxy
+     *
+     * @type String
+     * @private
+     */
+    dragElId: null,
+
+    /**
+     * the id of the element that initiates the drag operation.  By default
+     * this is the linked element, but could be changed to be a child of this
+     * element.  This lets us do things like only starting the drag when the
+     * header element within the linked html element is clicked.
+     *
+     * @type String
+     * @private
+     */
+    handleElId: null,
+
+    /**
+     * An array of HTML tags that will be ignored if clicked.
+     */
+    invalidHandleTypes: null,
+
+    /**
+     * The linked element's absolute X position at the time the drag was
+     * started
+     *
+     * @type int
+     * @private
+     */
+    startPageX: 0,
+
+    /**
+     * The linked element's absolute X position at the time the drag was
+     * started
+     *
+     * @type int
+     * @private
+     */
+    startPageY: 0,
+
+    /**
+     * The group defines a logical collection of DragDrop objects that are
+     * related.  Instances only get events when interacting with other
+     * DragDrop object in the same group.  This lets us define multiple
+     * groups using a single DragDrop subclass if we want.
+     *
+     */
+    groups: null,
+
+    /**
+     * Individual drag/drop instances can be locked.  This will prevent
+     * onmousedown start drag.
+     *
+     * @type boolean
+     * @private
+     */
+    locked: false,
+
+    /**
+     * Lock this instance
+     */
+    lock: function() { this.locked = true; },
+
+    /**
+     * Unlock this instace
+     */
+    unlock: function() { this.locked = false; },
+
+    /**
+     * By default, all insances can be a drop target.  This can be disabled by
+     * setting isTarget to false.
+     *
+     * @type boolean
+     */
+    isTarget: true,
+
+    /**
+     * The padding configured for this drag and drop object for calculating
+     * the drop zone intersection with this object.
+     */
+    padding: null,
+
+    /**
+     * @private
+     */
+    _domRef: null,
+
+    /**
+     * Internal typeof flag
+     * @private
+     */
+    __ygDragDrop: true,
+
+    /**
+     * Set to true when horizontal contraints are applied
+     *
+     * @type boolean
+     * @private
+     */
+    constrainX: false,
+
+    /**
+     * Set to true when vertical contraints are applied
+     *
+     * @type boolean
+     * @private
+     */
+    constrainY: false,
+
+    /**
+     * The left constraint
+     *
+     * @type int
+     * @private
+     */
+    minX: 0,
+
+    /**
+     * The right constraint
+     *
+     * @type int
+     * @private
+     */
+    maxX: 0,
+
+    /**
+     * The up constraint
+     *
+     * @type int
+     * @private
+     */
+    minY: 0,
+
+    /**
+     * The down constraint
+     *
+     * @type int
+     * @private
+     */
+    maxY: 0,
+
+    /**
+     * Maintain offsets when we resetconstraints.  Used to maintain the
+     * slider thumb value, and this needs to be fixed.
+     * @type boolean
+     */
+    maintainOffset: false,
+
+    /**
+     * Array of pixel locations the element will snap to if we specified a
+     * horizontal graduation/interval.  This array is generated automatically
+     * when you define a tick interval.
+     * @type int[]
+     */
+    xTicks: null,
+
+    /**
+     * Array of pixel locations the element will snap to if we specified a
+     * vertical graduation/interval.  This array is generated automatically
+     * when you define a tick interval.
+     * @type int[]
+     */
+    yTicks: null,
+
+    /**
+     * By default the drag and drop instance will only respond to the primary
+     * button click (left button for a right-handed mouse).  Set to true to
+     * allow drag and drop to start with any mouse click that is propogated
+     * by the browser
+     * @type boolean
+     */
+    primaryButtonOnly: true,
+
+    /**
+     * Code that executes immediately before the startDrag event
+     * @private
+     */
+    b4StartDrag: function(x, y) { },
+
+    /**
+     * Abstract method called after a drag/drop object is clicked
+     * and the drag or mousedown time thresholds have beeen met.
+     *
+     * @param {int} X click location
+     * @param {int} Y click location
+     */
+    startDrag: function(x, y) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDrag event
+     * @private
+     */
+    b4Drag: function(e) { },
+
+    /**
+     * Abstract method called during the onMouseMove event while dragging an
+     * object.
+     *
+     * @param {Event} e
+     */
+    onDrag: function(e) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragEnter event
+     * @private
+     */
+    // b4DragEnter: function(e) { },
+
+    /**
+     * Abstract method called when this element fist begins hovering over
+     * another DragDrop obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this is hovering over.  In INTERSECT mode, an array of one or more
+     * dragdrop items being hovered over.
+     */
+    onDragEnter: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragOver event
+     * @private
+     */
+    b4DragOver: function(e) { },
+
+    /**
+     * Abstract method called when this element is hovering over another
+     * DragDrop obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this is hovering over.  In INTERSECT mode, an array of dd items
+     * being hovered over.
+     */
+    onDragOver: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragOut event
+     * @private
+     */
+    b4DragOut: function(e) { },
+
+    /**
+     * Abstract method called when we are no longer hovering over an element
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this was hovering over.  In INTERSECT mode, an array of dd items
+     * that the mouse is no longer over.
+     */
+    onDragOut: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the onDragDrop event
+     * @private
+     */
+    b4DragDrop: function(e) { },
+
+    /**
+     * Abstract method called when this item is dropped on another DragDrop
+     * obj
+     *
+     * @param {Event} e
+     * @param {String || YAHOO.util.DragDrop[]} id In POINT mode, the element
+     * id this was dropped on.  In INTERSECT mode, an array of dd items this
+     * was dropped on.
+     */
+    onDragDrop: function(e, id) { /* override this */ },
+
+    /**
+     * Code that executes immediately before the endDrag event
+     * @private
+     */
+    b4EndDrag: function(e) { },
+
+    /**
+     * Fired when we are done dragging the object
+     *
+     * @param {Event} e
+     */
+    endDrag: function(e) { /* override this */ },
+
+    /**
+     * Code executed immediately before the onMouseDown event
+
+     * @param {Event} e
+     * @private
+     */
+    b4MouseDown: function(e) {  },
+
+    /**
+     * Event handler that fires when a drag/drop obj gets a mousedown
+     * @param {Event} e
+     */
+    onMouseDown: function(e) { /* override this */ },
+
+    /**
+     * Event handler that fires when a drag/drop obj gets a mouseup
+     * @param {Event} e
+     */
+    onMouseUp: function(e) { /* override this */ },
+
+    /**
+     * Returns a reference to the linked element
+     *
+     * @return {Object} the html element
+     */
+    getEl: function() {
+        if (!this._domRef) {
+            this._domRef = this.DDM.getElement(this.id);
+        }
+
+        return this._domRef;
+    },
+
+    /**
+     * Returns a reference to the actual element to drag.  By default this is
+     * the same as the html element, but it can be assigned to another
+     * element. An example of this can be found in YAHOO.util.DDProxy
+     *
+     * @return {Object} the html element
+     */
+    getDragEl: function() {
+        return this.DDM.getElement(this.dragElId);
+    },
+
+    /**
+     * Sets up the DragDrop object.  Must be called in the constructor of any
+     * YAHOO.util.DragDrop subclass
+     *
+     * @param id the id of the linked element
+     * @param {String} sGroup the group of related items
+     * element is supposed to be a target only, set to false.
+     */
+    init: function(id, sGroup) {
+        this.initTarget(id, sGroup);
+        YAHOO.util.Event.addListener(id, "mousedown",
+                                          this.handleMouseDown, this, true);
+    },
+
+    /**
+     * Initializes Targeting functionality only... the object does not
+     * get a mousedown handler.
+     *
+     * @param id the id of the linked element
+     * @param {String} sGroup the group of related items
+     * element is supposed to be a target only, set to false.
+     */
+    initTarget: function(id, sGroup) {
+
+        // create a local reference to the drag and drop manager
+        this.DDM = YAHOO.util.DDM;
+
+
+        // set the default padding
+        this.padding = [0, 0, 0, 0];
+
+        // initialize the groups array
+        this.groups = {};
+
+        // set the id
+        this.id = id;
+
+        // the element is a drag handle by default
+        this.setDragElId(id);
+
+        // by default, clicked anchors will not start drag operations
+        this.invalidHandleTypes = {a : "a"};
+
+        // We don't want to register this as the handle with the manager
+        // so we just set the id rather than calling the setter
+        this.handleElId = id;
+
+        // cache the position of the element if we can
+        if (document && document.body) {
+            this.setInitPosition();
+        }
+
+        // add to an interaction group
+        this.addToGroup((sGroup) ? sGroup : "default");
+
+    },
+
+    /**
+     * Configures the padding for the target zone in px.  Effectively expands
+     * (or reduces) the virtual object size for targeting calculations.
+     * Supports css-style shorthand; if only one parameter is passed, all sides
+     * will have that padding, and if only two are passed, the top and bottom
+     * will have the first param, the left and right the second.
+     * @param {int} iTop    Top pad
+     * @param {int} iRight  Right pad
+     * @param {int} iBot    Bot pad
+     * @param {int} iLeft   Left pad
+     */
+    setPadding: function(iTop, iRight, iBot, iLeft) {
+        // this.padding = [iLeft, iRight, iTop, iBot];
+        if (!iRight && 0 !== iRight) {
+            this.padding = [iTop, iTop, iTop, iTop];
+        } else if (!iBot && 0 !== iBot) {
+            this.padding = [iTop, iRight, iTop, iRight];
+        } else {
+            this.padding = [iTop, iRight, iBot, iLeft];
+        }
+    },
+
+    /**
+     * Stores the initial placement of the dd element
+     */
+    setInitPosition: function(diffX, diffY) {
+        var el = this.getEl();
+
+        if (!this.DDM.verifyEl(el)) {
+            return;
+        }
+
+        var dx = diffX || 0;
+        var dy = diffY || 0;
+
+        var p = YAHOO.util.Dom.getXY( el );
+
+        this.initPageX = p[0] - dx;
+        this.initPageY = p[1] - dy;
+
+        this.lastPageX = p[0];
+        this.lastPageY = p[1];
+
+        this.setStartPosition(p);
+    },
+
+    /**
+     * Sets the start position of the element.  This is set when the obj
+     * is initialized, the reset when a drag is started.
+     * @param pos current position (from previous lookup)
+     * @private
+     */
+    setStartPosition: function(pos) {
+
+        var p = pos || YAHOO.util.Dom.getXY( this.getEl() );
+
+        this.startPageX = p[0];
+        this.startPageY = p[1];
+    },
+
+    /**
+     * Add this instance to a group of related drag/drop objects.  All
+     * instances belong to at least one group, and can belong to as many
+     * groups as needed.
+     *
+     * @param sGroup {string} the name of the group
+     */
+    addToGroup: function(sGroup) {
+        this.groups[sGroup] = true;
+        this.DDM.regDragDrop(this, sGroup);
+    },
+
+    /**
+     * Allows you to specify that an element other than the linked element
+     * will be moved with the cursor during a drag
+     *
+     * @param id the id of the element that will be used to initiate the drag
+     */
+    setDragElId: function(id) {
+        this.dragElId = id;
+    },
+
+    /**
+     * Allows you to specify a child of the linked element that should be
+     * used to initiate the drag operation.  An example of this would be if
+     * you have a content div with text and links.  Clicking anywhere in the
+     * content area would normally start the drag operation.  Use this method
+     * to specify that an element inside of the content div is the element
+     * that starts the drag operation.
+     *
+     * @param id the id of the element that will be used to initiate the drag
+     */
+    setHandleElId: function(id) {
+        this.handleElId = id;
+        this.DDM.regHandle(this.id, id);
+    },
+
+    /**
+     * Allows you to set an element outside of the linked element as a drag
+     * handle
+     */
+    setOuterHandleElId: function(id) {
+        YAHOO.util.Event.addListener(id, "mousedown",
+                this.handleMouseDown, this, true);
+        this.setHandleElId(id);
+    },
+
+    /**
+     * Remove all drag and drop hooks for this element
+     */
+    unreg: function() {
+        YAHOO.util.Event.removeListener(this.id, "mousedown",
+                this.handleMouseDown);
+        this._domRef = null;
+        this.DDM._remove(this);
+    },
+
+    /**
+     * Returns true if this instance is locked, or the drag drop mgr is locked
+     * (meaning that all drag/drop is disabled on the page.)
+     *
+     * @return {boolean} true if this obj or all drag/drop is locked, else
+     * false
+     */
+    isLocked: function() {
+        return (this.DDM.isLocked() || this.locked);
+    },
+
+    /**
+     * Fired when this object is clicked
+     *
+     * @param {Event} e
+     * @param {YAHOO.util.DragDrop} oDD the clicked dd object (this dd obj)
+     * @private
+     */
+    handleMouseDown: function(e, oDD) {
+
+
+        var EU = YAHOO.util.Event;
+
+
+        var button = e.which || e.button;
+
+        if (this.primaryButtonOnly && button > 1) {
+            return;
+        }
+
+        if (this.isLocked()) {
+            return;
+        }
+
+
+        this.DDM.refreshCache(this.groups);
+
+        // Only process the event if we really clicked within the linked
+        // element.  The reason we make this check is that in the case that
+        // another element was moved between the clicked element and the
+        // cursor in the time between the mousedown and mouseup events. When
+        // this happens, the element gets the next mousedown event
+        // regardless of where on the screen it happened.
+        var pt = new YAHOO.util.Point(EU.getPageX(e), EU.getPageY(e));
+        if ( this.DDM.isOverTarget(pt, this) )  {
+
+
+            //  check to see if the handle was clicked
+            var srcEl = EU.getTarget(e);
+
+            if (this.isValidHandleChild(srcEl) &&
+                    (this.id == this.handleElId ||
+                     this.DDM.handleWasClicked(srcEl, this.id)) ) {
+
+                // set the initial element position
+                this.setStartPosition();
+
+
+                this.b4MouseDown(e);
+                this.onMouseDown(e);
+                this.DDM.handleMouseDown(e, this);
+
+                this.DDM.stopEvent(e);
+            }
+        }
+    },
+
+    /**
+     * Allows you to specify a tag name that should not start a drag operation
+     * when clicked.  This is designed to facilitate embedding links within a
+     * drag handle that do something other than start the drag.
+     *
+     * @param {string} tagName the type of element to exclude
+     */
+    addInvalidHandleType: function(tagName) {
+        var type = tagName.toUpperCase();
+        this.invalidHandleTypes[type] = type;
+    },
+
+    /**
+     * Unsets an excluded tag name set by addInvalidHandleType
+     *
+     * @param {string} tagName the type of element to unexclude
+     */
+    removeInvalidHandleType: function(tagName) {
+        var type = tagName.toUpperCase();
+        this.invalidHandleTypes[type] = null;
+    },
+
+    /**
+     * Checks the tag exclusion list to see if this click should be ignored
+     *
+     * @param {ygNode} node
+     * @return {boolean} true if this is a valid tag type, false if not
+     */
+    isValidHandleChild: function(node) {
+        var type = node.nodeName;
+
+        if (type == "#text") {
+            type = node.parentNode.nodeName;
+        }
+
+        return (!this.invalidHandleTypes[type]);
+    },
+
+    /**
+     * Create the array of horizontal tick marks if an interval was specified
+     * in setXConstraint().
+     *
+     * @private
+     */
+    setXTicks: function(iStartX, iTickSize) {
+        this.xTicks = [];
+        this.xTickSize = iTickSize;
+
+        var tickMap = {};
+
+        for (var i = this.initPageX; i >= this.minX; i = i - iTickSize) {
+            if (!tickMap[i]) {
+                this.xTicks[this.xTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        for (i = this.initPageX; i <= this.maxX; i = i + iTickSize) {
+            if (!tickMap[i]) {
+                this.xTicks[this.xTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        this.xTicks.sort(this.DDM.numericSort) ;
+    },
+
+    /**
+     * Create the array of vertical tick marks if an interval was specified in
+     * setYConstraint().
+     *
+     * @private
+     */
+    setYTicks: function(iStartY, iTickSize) {
+        this.yTicks = [];
+        this.yTickSize = iTickSize;
+
+        var tickMap = {};
+
+        for (var i = this.initPageY; i >= this.minY; i = i - iTickSize) {
+            if (!tickMap[i]) {
+                this.yTicks[this.yTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        for (i = this.initPageY; i <= this.maxY; i = i + iTickSize) {
+            if (!tickMap[i]) {
+                this.yTicks[this.yTicks.length] = i;
+                tickMap[i] = true;
+            }
+        }
+
+        this.yTicks.sort(this.DDM.numericSort) ;
+    },
+
+    /**
+     * By default, the element can be dragged any place on the screen.  Use
+     * this method to limit the horizontal travel of the element.  Pass in
+     * 0,0 for the parameters if you want to lock the drag to the y axis.
+     *
+     * @param {int} iLeft the number of pixels the element can move to the left
+     * @param {int} iRight the number of pixels the element can move to the
+     * right
+     * @param {int} iTickSize optional parameter for specifying that the
+     * element
+     * should move iTickSize pixels at a time.
+     */
+    setXConstraint: function(iLeft, iRight, iTickSize) {
+        this.leftConstraint = iLeft;
+        this.rightConstraint = iRight;
+
+        this.minX = this.initPageX - iLeft;
+        this.maxX = this.initPageX + iRight;
+        if (iTickSize) { this.setXTicks(this.initPageX, iTickSize); }
+
+        this.constrainX = true;
+    },
+
+    /**
+     * By default, the element can be dragged any place on the screen.  Set
+     * this to limit the vertical travel of the element.  Pass in 0,0 for the
+     * parameters if you want to lock the drag to the x axis.
+     *
+     * @param {int} iUp the number of pixels the element can move up
+     * @param {int} iDown the number of pixels the element can move down
+     * @param {int} iTickSize optional parameter for specifying that the
+     * element should move iTickSize pixels at a time.
+     */
+    setYConstraint: function(iUp, iDown, iTickSize) {
+        this.topConstraint = iUp;
+        this.bottomConstraint = iDown;
+
+        this.minY = this.initPageY - iUp;
+        this.maxY = this.initPageY + iDown;
+        if (iTickSize) { this.setYTicks(this.initPageY, iTickSize); }
+
+        this.constrainY = true;
+
+    },
+
+    /**
+     * resetConstraints must be called if you manually reposition a dd element.
+     * @param {boolean} maintainOffset
+     */
+    resetConstraints: function() {
+
+
+        // figure out how much this thing has moved
+        var dx = (this.maintainOffset) ? this.lastPageX - this.initPageX : 0;
+        var dy = (this.maintainOffset) ? this.lastPageY - this.initPageY : 0;
+
+
+        // reset the initial location
+        this.setInitPosition(dx, dy);
+
+        if (this.constrainX) {
+            this.setXConstraint( this.leftConstraint,
+                                 this.rightConstraint,
+                                 this.xTickSize        );
+        }
+
+        if (this.constrainY) {
+            this.setYConstraint( this.topConstraint,
+                                 this.bottomConstraint,
+                                 this.yTickSize         );
+        }
+    },
+
+    /**
+     * Normally the drag element is moved pixel by pixel, but we can specify
+     * that it move a number of pixels at a time.  This method resolves the
+     * location when we have it set up like this.
+     *
+     * @param {int} val where we want to place the object
+     * @param {int[]} tickArray sorted array of valid points
+     * @return {int} the closest tick
+     * @private
+     */
+    getTick: function(val, tickArray) {
+
+        if (!tickArray) {
+            // If tick interval is not defined, it is effectively 1 pixel,
+            // so we return the value passed to us.
+            return val;
+        } else if (tickArray[0] >= val) {
+            // The value is lower than the first tick, so we return the first
+            // tick.
+            return tickArray[0];
+        } else {
+            for (var i = 0; i < tickArray.length; ++i) {
+                var next = i + 1;
+                if (tickArray[next] && tickArray[next] >= val) {
+                    var diff1 = val - tickArray[i];
+                    var diff2 = tickArray[next] - val;
+                    return (diff2 > diff1) ? tickArray[i] : tickArray[next];
+                }
+            }
+
+            // The value is larger than the last tick, so we return the last
+            // tick.
+            return tickArray[tickArray.length - 1];
+        }
+    },
+
+    /**
+     * toString method
+     * @return {string} string representation of the dd obj
+     */
+    toString: function(val, tickArray) {
+        return ("YAHOO.util.DragDrop {" + this.id + "}");
+    }
+
+};
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+// Only load the library once.  Rewriting the manager class would orphan
+// existing drag and drop instances.
+if (!YAHOO.util.DragDropMgr) {
+
+    /**
+     * @class Handles the element interaction for all DragDrop items in the
+     * window.  Generally, you will not call this class directly, but it does
+     * have helper methods that could be useful in your DragDrop
+     * implementations.  This class should not be instantiated; all methods
+     * are are static.
+     *
+     * @constructor
+     */
+    YAHOO.util.DragDropMgr = new function() {
+
+        /**
+         * utility package shorthand
+         * @private
+         */
+        var UTIL = YAHOO.util;
+
+        /**
+         * Two dimensional Array of registered DragDrop objects.  The first
+         * dimension is the DragDrop item group, the second the DragDrop
+         * object.
+         *
+         * @private
+         */
+        this.ids = {};
+
+        /**
+         * Array of element ids defined as drag handles.  Used to determine
+         * if the element that generated the mousedown event is actually the
+         * handle and not the html element itself.
+         *
+         * @private
+         */
+        this.handleIds = {};
+
+        /**
+         * the DragDrop object that is currently being dragged
+         *
+         * @type DragDrop
+         * @private
+         **/
+        this.dragCurrent = null;
+
+        /**
+         * the DragDrop object(s) that are being hovered over
+         *
+         * @type Array
+         * @private
+         */
+        this.dragOvers = {};
+
+        /**
+         * @private
+         */
+
+        /**
+         * the X distance between the cursor and the object being dragged
+         *
+         * @type int
+         * @private
+         */
+        this.deltaX = 0;
+
+        /**
+         * the Y distance between the cursor and the object being dragged
+         *
+         * @type int
+         * @private
+         */
+        this.deltaY = 0;
+
+        /**
+         * Flag to determine if we should prevent the default behavior of the
+         * events we define. By default this is true, but this can be set to
+         * false if you need the default behavior (not recommended)
+         *
+         * @type boolean
+         */
+        this.preventDefault = true;
+
+        /**
+         * Flag to determine if we should stop the propagation of the events
+         * we generate. This is true by default but you may want to set it to
+         * false if the html element contains other features that require the
+         * mouse click.
+         *
+         * @type boolean
+         */
+        this.stopPropagation = true;
+
+        /**
+         * @private
+         */
+        this.initalized = false;
+
+        /**
+         * All drag and drop can be disabled.
+         *
+         * @private
+         */
+        this.locked = false;
+
+        /**
+         * Called the first time an element is registered.
+         *
+         * @private
+         */
+        this.init = function() {
+        };
+
+        /**
+         * In point mode, drag and drop interaction is defined by the
+         * location of the cursor during the drag/drop
+         * @type int
+         */
+        this.POINT     = 0;
+
+        /**
+         * In intersect mode, drag and drop interactio nis defined by the
+         * overlap of two or more drag and drop objects.
+         * @type int
+         */
+        this.INTERSECT = 1;
+
+        /**
+         * The current drag and drop mode.  Default it point mode
+         * @type int
+         */
+        this.mode = this.POINT;
+
+        /**
+         * Runs method on all drag and drop objects
+         * @private
+         */
+        this._execOnAll = function(sMethod, args) {
+            for (var i in this.ids) {
+                for (var j in this.ids[i]) {
+                    var oDD = this.ids[i][j];
+                    if (! this.isTypeOfDD(oDD)) {
+                        continue;
+                    }
+                    oDD[sMethod].apply(oDD, args);
+                }
+            }
+        };
+
+        /**
+         * Drag and drop initialization.  Sets up the global event handlers
+         * @private
+         */
+        this._onLoad = function() {
+
+            this._execOnAll("setInitPosition", []);
+
+
+            var EU = UTIL.Event;
+
+            EU.addListener(document, "mouseup",   this.handleMouseUp, this, true);
+            EU.addListener(document, "mousemove", this.handleMouseMove, this, true);
+            EU.addListener(window,   "unload",    this._onUnload, this, true);
+            EU.addListener(window,   "resize",    this._onResize, this, true);
+            // EU.addListener(window,   "mouseout",    this._test);
+
+            this.initalized = true;
+
+        };
+
+        /**
+         * Reset constraints on all drag and drop objs
+         * @private
+         */
+        this._onResize = function(e) {
+            this._execOnAll("resetConstraints", []);
+        };
+
+        /**
+         * Lock all drag and drop functionality
+         */
+        this.lock = function() { this.locked = true; };
+
+        /**
+         * Unlock all drag and drop functionality
+         */
+        this.unlock = function() { this.locked = false; };
+
+        /**
+         * Is drag and drop locked?
+         *
+         * @return {boolean} True if drag and drop is locked, false otherwise.
+         */
+        this.isLocked = function() { return this.locked; };
+
+        /**
+         * Location cache that is set for all drag drop objects when a drag is
+         * initiated, cleared when the drag is finished.
+         *
+         * @private
+         */
+        this.locationCache = {};
+
+        /**
+         * Set useCache to false if you want to force object the lookup of each
+         * drag and drop linked element constantly during a drag.
+         * @type boolean
+         */
+        this.useCache = true;
+
+        /**
+         * The number of pixels that the mouse needs to move after the
+         * mousedown before the drag is initiated.  Default=3;
+         * @type int
+         */
+        this.clickPixelThresh = 3;
+
+        /**
+         * The number of milliseconds after the mousedown event to initiate the
+         * drag if we don't get a mouseup event. Default=1000
+         * @type int
+         */
+        this.clickTimeThresh = 1000;
+
+        /**
+         * Flag that indicates that either the drag pixel threshold or the
+         * mousdown time threshold has been met
+         * @type boolean
+         * @private
+         */
+        this.dragThreshMet = false;
+
+        /**
+         * Timeout used for the click time threshold
+         * @type Object
+         * @private
+         */
+        this.clickTimeout = null;
+
+        /**
+         * The X position of the mousedown event stored for later use when a
+         * drag threshold is met.
+         * @type int
+         * @private
+         */
+        this.startX = 0;
+
+        /**
+         * The Y position of the mousedown event stored for later use when a
+         * drag threshold is met.
+         * @type int
+         * @private
+         */
+        this.startY = 0;
+
+        /**
+         * Each DragDrop instance must be registered with the DragDropMgr.
+         * This is executed in ygDragDrop.init()
+         *
+         * @param {DragDrop} oDD the DragDrop object to register
+         * @param {String} sGroup the name of the group this element belongs to
+         */
+        this.regDragDrop = function(oDD, sGroup) {
+            if (!this.initialized) { this.init(); }
+
+            if (!this.ids[sGroup]) {
+                this.ids[sGroup] = {};
+            }
+            this.ids[sGroup][oDD.id] = oDD;
+        };
+
+        /**
+         * Unregisters a drag and drop item.  This is executed in
+         * ygDragDrop.unreg, use that method instead of calling this directly.
+         * @private
+         */
+        this._remove = function(oDD) {
+            for (var g in oDD.groups) {
+                if (g && this.ids[g][oDD.id]) {
+                    delete this.ids[g][oDD.id];
+                }
+            }
+            delete this.handleIds[oDD.id];
+        };
+
+        /**
+         * Each DragDrop handle element must be registered.  This is done
+         * automatically when executing ygDragDrop.setHandleElId()
+         *
+         * @param {String} sDDId the DragDrop id this element is a handle for
+         * @param {String} sHandleId the id of the element that is the drag
+         * handle
+         */
+        this.regHandle = function(sDDId, sHandleId) {
+            if (!this.handleIds[sDDId]) {
+                this.handleIds[sDDId] = {};
+            }
+            this.handleIds[sDDId][sHandleId] = sHandleId;
+        };
+
+        /**
+         * Utility function to determine if a given element has been
+         * registered as a drag drop item.
+         *
+         * @param {String} id the element id to check
+         * @return {boolean} true if this element is a DragDrop item,
+         * false otherwise
+         */
+        this.isDragDrop = function(id) {
+            return ( this.getDDById(id) ) ? true : false;
+        };
+
+        /**
+         * Returns the drag and drop instances that are in all groups the
+         * passed in instance belongs to.
+         *
+         * @param {ygDragDrop} p_oDD the obj to get related data for
+         * @param {boolean} bTargetsOnly if true, only return targetable objs
+         * @return {ygDragDrop[]} the related instances
+         */
+        this.getRelated = function(p_oDD, bTargetsOnly) {
+            var oDDs = [];
+            for (var i in p_oDD.groups) {
+                for (j in this.ids[i]) {
+                    var dd = this.ids[i][j];
+                    if (! this.isTypeOfDD(dd)) {
+                        continue;
+                    }
+                    if (!bTargetsOnly || dd.isTarget) {
+                        oDDs[oDDs.length] = dd;
+                    }
+                }
+            }
+
+            return oDDs;
+        };
+
+        /**
+         * Returns true if the specified dd target is a legal target for
+         * the specifice drag obj
+         *
+         * @param {ygDragDrop} the drag obj
+         * @param {ygDragDrop) the target
+         * @return {boolean} true if the target is a legal target for the
+         * dd obj
+         */
+        this.isLegalTarget = function (oDD, oTargetDD) {
+            var targets = this.getRelated(oDD);
+            for (var i =0;i<targets.length;++i) {
+                if (targets[i].id == oTargetDD.id) {
+                    return true;
+                }
+            }
+
+            return false;
+        };
+
+        /**
+         * My goal is to be able to transparently determine if an object is
+         * typeof ygDragDrop, and the exact subclass of ygDragDrop.  typeof
+         * returns "object", oDD.constructor.toString() always returns
+         * "ygDragDrop" and not the name of the subclass.  So for now it just
+         * evaluates a well-known variable in ygDragDrop.
+         *
+         * @param {Object} the object to evaluate
+         * @return {boolean} true if typeof oDD = ygDragDrop
+         */
+        this.isTypeOfDD = function (oDD) {
+            return (oDD && oDD.__ygDragDrop);
+        };
+
+        /**
+         * Utility function to determine if a given element has been
+         * registered as a drag drop handle for the given Drag Drop object.
+         *
+         * @param {String} id the element id to check
+         * @return {boolean} true if this element is a DragDrop handle, false
+         * otherwise
+         */
+        this.isHandle = function(sDDId, sHandleId) {
+            return ( this.handleIds[sDDId] &&
+                            this.handleIds[sDDId][sHandleId] );
+        };
+
+        /**
+         * Returns the DragDrop instance for a given id
+         *
+         * @param {String} id the id of the DragDrop object
+         * @return {DragDrop} the drag drop object, null if it is not found
+         */
+        this.getDDById = function(id) {
+            for (var i in this.ids) {
+                if (this.ids[i][id]) {
+                    return this.ids[i][id];
+                }
+            }
+            return null;
+        };
+
+        /**
+         * Fired after a registered DragDrop object gets the mousedown event.
+         * Sets up the events required to track the object being dragged
+         *
+         * @param {Event} e the event
+         * @param oDD the DragDrop object being dragged
+         * @private
+         */
+        this.handleMouseDown = function(e, oDD) {
+            this.dragCurrent = oDD;
+
+            var el = oDD.getEl();
+
+            // track start position
+            this.startX = UTIL.Event.getPageX(e);
+            this.startY = UTIL.Event.getPageY(e);
+
+            this.deltaX = this.startX - el.offsetLeft;
+            this.deltaY = this.startY - el.offsetTop;
+
+            this.dragThreshMet = false;
+
+            this.clickTimeout = setTimeout(
+               "var DDM=YAHOO.util.DDM;DDM.startDrag(DDM.startX, DDM.startY)",
+               this.clickTimeThresh );
+        };
+
+        /**
+         * Fired when either the drag pixel threshol or the mousedown hold
+         * time threshold has been met.
+         *
+         * @param x {int} the X position of the original mousedown
+         * @param y {int} the Y position of the original mousedown
+         */
+        this.startDrag = function(x, y) {
+            clearTimeout(this.clickTimeout);
+            if (this.dragCurrent) {
+                this.dragCurrent.b4StartDrag(x, y);
+                this.dragCurrent.startDrag(x, y);
+            }
+            this.dragThreshMet = true;
+        };
+
+        /**
+         * Internal function to handle the mouseup event.  Will be invoked
+         * from the context of the document.
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.handleMouseUp = function(e) {
+
+            if (! this.dragCurrent) {
+                return;
+            }
+
+            clearTimeout(this.clickTimeout);
+
+            if (this.dragThreshMet) {
+                this.fireEvents(e, true);
+            } else {
+            }
+
+            this.stopDrag(e);
+
+            this.stopEvent(e);
+        };
+
+        /**
+         * Utility to stop event propagation and event default, if these
+         * features are turned on.
+         *
+         * @param {Event} e the event as returned by this.getEvent()
+         */
+        this.stopEvent = function(e) {
+            if (this.stopPropagation) {
+                UTIL.Event.stopPropagation(e);
+            }
+
+            if (this.preventDefault) {
+                UTIL.Event.preventDefault(e);
+            }
+        };
+
+        /**
+         * Internal function to clean up event handlers after the drag
+         * operation is complete
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.stopDrag = function(e) {
+
+            // Fire the drag end event for the item that was dragged
+            if (this.dragCurrent) {
+                if (this.dragThreshMet) {
+                    this.dragCurrent.b4EndDrag(e);
+                    this.dragCurrent.endDrag(e);
+                }
+
+                this.dragCurrent.onMouseUp(e);
+            }
+
+            this.dragCurrent = null;
+            this.dragOvers = {};
+        };
+
+        /**
+         * Internal function to handle the mousemove event.  Will be invoked
+         * from the context of the html element.
+         *
+         * @TODO figure out what we can do about mouse events lost when the
+         * user drags objects beyond the window boundary.  Currently we can
+         * detect this in internet explorer by verifying that the mouse is
+         * down during the mousemove event.  Firefox doesn't give us the
+         * button state on the mousemove event.
+         *
+         * @param {Event} e the event
+         * @private
+         */
+        this.handleMouseMove = function(e) {
+            if (! this.dragCurrent) {
+                return;
+            }
+
+            // var button = e.which || e.button;
+
+
+            // check for IE mouseup outside of page boundary
+            if (UTIL.Event.isIE && !e.button) {
+                this.stopEvent(e);
+                return this.handleMouseUp(e);
+            }
+
+            if (!this.dragThreshMet) {
+                var diffX = Math.abs(this.startX - UTIL.Event.getPageX(e));
+                var diffY = Math.abs(this.startY - UTIL.Event.getPageY(e));
+                if (diffX > this.clickPixelThresh ||
+                            diffY > this.clickPixelThresh) {
+                    this.startDrag(this.startX, this.startY);
+                }
+            }
+
+            if (this.dragThreshMet) {
+                this.dragCurrent.b4Drag(e);
+                this.dragCurrent.onDrag(e);
+                this.fireEvents(e, false);
+            }
+
+            this.stopEvent(e);
+        };
+
+        /**
+         * Iterates over all of the DragDrop elements to find ones we are
+         * hovering over or dropping on
+         *
+         * @param {Event} e the event
+         * @param {boolean} isDrop is this a drop op or a mouseover op?
+         * @private
+         */
+        this.fireEvents = function(e, isDrop) {
+            var dc = this.dragCurrent;
+
+            // If the user did the mouse up outside of the window, we could
+            // get here even though we have ended the drag.
+            if (!dc || dc.isLocked()) {
+                return;
+            }
+
+            var x = UTIL.Event.getPageX(e);
+            var y = UTIL.Event.getPageY(e);
+            var pt = new YAHOO.util.Point(x,y);
+
+            // cache the previous dragOver array
+            var oldOvers = [];
+
+            var outEvts   = [];
+            var overEvts  = [];
+            var dropEvts  = [];
+            var enterEvts = [];
+
+            // Check to see if the object we were hovering over is no longer
+            // being hovered over so we can fire the onDragOut event
+            for (var i in this.dragOvers) {
+
+                var ddo = this.dragOvers[i];
+
+                if (! this.isTypeOfDD(ddo)) {
+                    continue;
+                }
+
+                if (! this.isOverTarget(pt, ddo, this.mode)) {
+                    outEvts.push( ddo );
+                }
+
+                oldOvers[i] = true;
+                delete this.dragOvers[i];
+            }
+
+            for (var sGroup in dc.groups) {
+
+                if ("string" != typeof sGroup) {
+                    continue;
+                }
+
+                for (i in this.ids[sGroup]) {
+                    var oDD = this.ids[sGroup][i];
+                    if (! this.isTypeOfDD(oDD)) {
+                        continue;
+                    }
+
+                    if (oDD.isTarget && !oDD.isLocked() && oDD != dc) {
+                        if (this.isOverTarget(pt, oDD, this.mode)) {
+                            // look for drop interactions
+                            if (isDrop) {
+                                dropEvts.push( oDD );
+                            // look for drag enter and drag over interactions
+                            } else {
+
+                                // initial drag over: dragEnter fires
+                                if (!oldOvers[oDD.id]) {
+                                    enterEvts.push( oDD );
+                                // subsequent drag overs: dragOver fires
+                                } else {
+                                    overEvts.push( oDD );
+                                }
+
+                                this.dragOvers[oDD.id] = oDD;
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (this.mode) {
+                if (outEvts.length > 0) {
+                    dc.b4DragOut(e, outEvts);
+                    dc.onDragOut(e, outEvts);
+                }
+
+                if (enterEvts.length > 0) {
+                    dc.onDragEnter(e, enterEvts);
+                }
+
+                if (overEvts.length > 0) {
+                    dc.b4DragOver(e, overEvts);
+                    dc.onDragOver(e, overEvts);
+                }
+
+                if (dropEvts.length > 0) {
+                    dc.b4DragDrop(e, dropEvts);
+                    dc.onDragDrop(e, dropEvts);
+                }
+
+            } else {
+                // fire dragout events
+                for (i=0; i < outEvts.length; ++i) {
+                    dc.b4DragOut(e, outEvts[i].id);
+                    dc.onDragOut(e, outEvts[i].id);
+                }
+
+                // fire enter events
+                for (i=0; i < enterEvts.length; ++i) {
+                    // dc.b4DragEnter(e, oDD.id);
+                    dc.onDragEnter(e, enterEvts[i].id);
+                }
+
+                // fire over events
+                for (i=0; i < overEvts.length; ++i) {
+                    dc.b4DragOver(e, overEvts[i].id);
+                    dc.onDragOver(e, overEvts[i].id);
+                }
+
+                // fire drop events
+                for (i=0; i < dropEvts.length; ++i) {
+                    dc.b4DragDrop(e, dropEvts[i].id);
+                    dc.onDragDrop(e, dropEvts[i].id);
+                }
+
+            }
+
+        };
+
+        /**
+         * Helper function for getting the best match from the list of drag
+         * and drop objects returned by the drag and drop events when we are
+         * in INTERSECT mode.  It returns either the first object that the
+         * cursor is over, or the object that has the greatest overlap with
+         * the dragged element.
+         *
+         * @param  {ygDragDrop[]} dds The array of drag and drop objects
+         * targeted
+         * @return {ygDragDrop}       The best single match
+         */
+        this.getBestMatch = function(dds) {
+            var winner = null;
+            // Return null if the input is not what we expect
+            //if (!dds || !dds.length || dds.length == 0) {
+               // winner = null;
+            // If there is only one item, it wins
+            //} else if (dds.length == 1) {
+
+            if (dds.length == 1) {
+                winner = dds[0];
+            } else {
+                // Loop through the targeted items
+                for (var i=0; i<dds.length; ++i) {
+                    var dd = dds[i];
+                    // If the cursor is over the object, it wins.  If the
+                    // cursor is over multiple matches, the first one we come
+                    // to wins.
+                    if (dd.cursorIsOver) {
+                        winner = dd;
+                        break;
+                    // Otherwise the object with the most overlap wins
+                    } else {
+                        if (!winner ||
+                            winner.overlap.getArea() < dd.overlap.getArea()) {
+                            winner = dd;
+                        }
+                    }
+                }
+            }
+
+            return winner;
+        };
+
+        /**
+         * Refreshes the cache of the top-left and bottom-right points of the
+         * drag and drop objects in the specified groups
+         *
+         * @param {Array} aGroups an associative array of groups to refresh
+         */
+        this.refreshCache = function(aGroups) {
+            for (sGroup in aGroups) {
+                if ("string" != typeof sGroup) {
+                    continue;
+                }
+                for (i in this.ids[sGroup]) {
+                    var oDD = this.ids[sGroup][i];
+
+                    if (this.isTypeOfDD(oDD)) {
+                        var loc = this.getLocation(oDD);
+                        if (loc) {
+                            this.locationCache[oDD.id] = loc;
+                        } else {
+                            delete this.locationCache[oDD.id];
+                            // this will unregister the drag and drop object if
+                            // the element is not in a usable state
+                            oDD.unreg();
+                        }
+                    }
+                }
+            }
+        };
+
+        /**
+         * This checks to make sure an element exists and is in the DOM.  The
+         * main purpose is to handle cases where innerHTML is used to remove
+         * drag and drop objects from the DOM.  IE provides an 'unspecified
+         * error' when trying to access the offsetParent of such an element
+         * @param {HTMLElement} el the element to check
+         * @return {boolean} true if the element looks usable
+         */
+        this.verifyEl = function(el) {
+            try {
+                if (el) {
+                    var parent = el.offsetParent;
+                    if (parent) {
+                        return true;
+                    }
+                }
+            } catch(e) {
+            }
+
+            return false;
+        };
+
+        /**
+         * Returns the an array containing the drag and drop element's position
+         * and size, including the ygDragDrop.padding configured for it
+         *
+         * @param {ygDragDrop} oDD the drag and drop object to get the
+         * location for
+         * @return array containing the top left and bottom right points of the
+         * element
+         */
+        this.getLocation = function(oDD) {
+            if (! this.isTypeOfDD(oDD)) {
+                return null;
+            }
+
+            var el = oDD.getEl();
+
+            if (!this.verifyEl(el)) {
+                return null;
+            }
+
+
+            // var aPos = ygPos.getPos(el);
+            var aPos = YAHOO.util.Dom.getXY(el);
+
+            x1 = aPos[0];
+            x2 = x1 + el.offsetWidth;
+
+            y1 = aPos[1];
+            y2 = y1 + el.offsetHeight;
+
+            var t = y1 - oDD.padding[0];
+            var r = x2 + oDD.padding[1];
+            var b = y2 + oDD.padding[2];
+            var l = x1 - oDD.padding[3];
+
+            return new YAHOO.util.Region( t, r, b, l );
+
+        };
+
+        /**
+         * Checks the cursor location to see if it over the target
+         *
+         * @param {YAHOO.util.Point} pt The point to evaluate
+         * @param {ygDragDrop} oDDTarget the DragDrop object we are inspecting
+         * @return {boolean} true if the mouse is over the target
+         * @private
+         */
+        this.isOverTarget = function(pt, oDDTarget, intersect) {
+            // use cache if available
+            var loc = this.locationCache[oDDTarget.id];
+            if (!loc || !this.useCache) {
+                loc = this.getLocation(oDDTarget);
+                this.locationCache[oDDTarget.id] = loc;
+
+            }
+
+
+            // var cursorIsOver =  (x >= loc[3] && x <= loc[1] && y >= loc[0] && y <= loc[2]);
+            //oDDTarget.cursorIsOver = loc.contains( new YAHOO.util.Point(x, y) );
+            oDDTarget.cursorIsOver = loc.contains( pt );
+            oDDTarget.overlap = null;
+
+            // if (this.INTERSECT == this.mode) {
+            if (intersect) {
+
+                var curRegion =
+                    YAHOO.util.Region.getRegion(this.dragCurrent.getDragEl());
+                var overlap = curRegion.intersect(loc);
+
+                if (overlap) {
+                    oDDTarget.overlap = overlap;
+                    return true;
+                } else {
+                    return false;
+                }
+
+            } else {
+                return oDDTarget.cursorIsOver;
+            }
+        };
+
+        /**
+         * @private
+         */
+        this._onUnload = function(e, me) {
+            this.unregAll();
+        };
+
+        /**
+         * Cleans up the drag and drop events and objects.
+         *
+         * @private
+         */
+        this.unregAll = function() {
+
+            if (this.dragCurrent) {
+                this.stopDrag();
+                this.dragCurrent = null;
+            }
+
+            this._execOnAll("unreg", []);
+
+            for (i in this.elementCache) {
+                delete this.elementCache[i];
+            }
+
+            this.elementCache = {};
+            this.ids = {};
+        };
+
+        /**
+         * A cache of DOM elements
+         *
+         * @private
+         */
+        this.elementCache = {};
+
+        /**
+         * Get the wrapper for the DOM element specified
+         *
+         * @param {String} id the id of the elment to get
+         * @return {YAHOO.util.DDM.ElementWrapper} the wrapped element
+         * @private
+         */
+        this.getElWrapper = function(id) {
+            var oWrapper = this.elementCache[id];
+            if (!oWrapper || !oWrapper.el) {
+                oWrapper = this.elementCache[id] =
+                    new this.ElementWrapper(document.getElementById(id));
+            }
+            return oWrapper;
+        };
+
+        /**
+         * Returns the actual DOM element
+         *
+         * @param {String} id the id of the elment to get
+         * @return {Object} The element
+         */
+        this.getElement = function(id) {
+            // return this.getElWrapper(id).el;
+            return document.getElementById(id);
+        };
+
+        /**
+         * Returns the style property for the DOM element (i.e.,
+         * document.getElById(id).style)
+         *
+         * @param {String} id the id of the elment to get
+         * @return {Object} The style property of the element
+         */
+        this.getCss = function(id) {
+            // return this.getElWrapper(id).css;
+            var css = null;
+            var el = document.getElementById(id);
+            if (el) {
+                css = el.style;
+            }
+
+            return css;
+        };
+
+        /**
+         * Inner class for cached elements
+         */
+        this.ElementWrapper = function(el) {
+                /**
+                 * @private
+                 */
+                this.el = el || null;
+                /**
+                 * @private
+                 */
+                this.id = this.el && el.id;
+                /**
+                 * @private
+                 */
+                this.css = this.el && el.style;
+            };
+
+        /**
+         * Returns the X position of an html element
+         * @param el the element for which to get the position
+         * @return {int} the X coordinate
+         */
+        this.getPosX = function(el) {
+            return YAHOO.util.Dom.getX(el);
+        };
+
+        /**
+         * Returns the Y position of an html element
+         * @param el the element for which to get the position
+         * @return {int} the Y coordinate
+         */
+        this.getPosY = function(el) {
+            return YAHOO.util.Dom.getY(el);
+        };
+
+        /**
+         * Swap two nodes.  In IE, we use the native method, for others we
+         * emulate the IE behavior
+         *
+         * @param n1 the first node to swap
+         * @param n2 the other node to swap
+         */
+        this.swapNode = function(n1, n2) {
+            if (n1.swapNode) {
+                n1.swapNode(n2);
+            } else {
+                // the node reference order for the swap is a little tricky.
+                var p = n2.parentNode;
+                var s = n2.nextSibling;
+                n1.parentNode.replaceChild(n2,n1);
+                p.insertBefore(n1,s);
+            }
+        };
+
+        /**
+         * @private
+         */
+        this.getScroll = function () {
+            var t, l;
+            if (document.documentElement && document.documentElement.scrollTop) {
+                t = document.documentElement.scrollTop;
+                l = document.documentElement.scrollLeft;
+            } else if (document.body) {
+                t = document.body.scrollTop;
+                l = document.body.scrollLeft;
+            }
+            return { top: t, left: l };
+        };
+
+        /**
+         * Returns the specified element style property
+         * @param {HTMLElement} el          the element
+         * @param {string}      styleProp   the style property
+         * @return {string}     The value of the style property
+         */
+        this.getStyle = function(el, styleProp) {
+            if (el.style.styleProp) {
+                return el.style.styleProp;
+            } else if (el.currentStyle) {
+                return el.currentStyle[styleProp];
+            } else if (document.defaultView) {
+                return document.defaultView.getComputedStyle(el, null).
+                    getPropertyValue(styleProp);
+            }
+        };
+
+        /**
+         * Gets the scrollTop
+         *
+         * @return {int} the document's scrollTop
+         */
+        this.getScrollTop = function () { return this.getScroll().top; };
+
+        /**
+         * Gets the scrollLeft
+         *
+         * @return {int} the document's scrollTop
+         */
+        this.getScrollLeft = function () { return this.getScroll().left; };
+
+        this.moveToEl = function (moveEl, targetEl) {
+            var aCoord = YAHOO.util.Dom.getXY(targetEl);
+            YAHOO.util.Dom.setXY(moveEl, aCoord);
+        };
+
+        /**
+         * Gets the client height
+         *
+         * @return {int} client height in px
+         */
+        this.getClientHeight = function() {
+            return (window.innerHeight) ? window.innerHeight :
+                (document.documentElement && document.documentElement.clientHeight) ?
+                document.documentElement.clientHeight : document.body.offsetHeight;
+        };
+
+        /**
+         * Gets the client width
+         *
+         * @return {int} client width in px
+         */
+        this.getClientWidth = function() {
+            return (window.innerWidth) ? window.innerWidth :
+                (document.documentElement && document.documentElement.clientWidth) ?
+                document.documentElement.clientWidth : document.body.offsetWidth;
+        };
+
+        /**
+         * numeric array sort function
+         */
+        this.numericSort = function(a, b) { return (a - b); };
+
+        /**
+         * @private
+         */
+        this._timeoutCount = 0;
+
+        /**
+         * @private
+         * Trying to make the load order less important.  Without this we get
+         * an error if this file is loaded before the Event Utility.
+         */
+        this._addListeners = function() {
+            if ( UTIL.Event &&
+                 document          &&
+                 document.body        ) {
+
+                this._onLoad();
+            } else {
+                if (this._timeoutCount > 500) {
+                } else {
+                    setTimeout("YAHOO.util.DDM._addListeners()", 10);
+                    this._timeoutCount += 1;
+                }
+            }
+
+        };
+
+        /**
+         * Recursively searches the immediate parent and all child nodes for
+         * the handle element in order to determine wheter or not it was
+         * clicked.
+         *
+         * @param node the html element to inspect
+         */
+        this.handleWasClicked = function(node, id) {
+            if (this.isHandle(id, node.id)) {
+                return true;
+            } else {
+                // check to see if this is a text node child of the one we want
+                var p = node.parentNode;
+
+                while (p) {
+                    if (this.isHandle(id, p.id)) {
+                        return true;
+                    } else {
+                        p = p.parentNode;
+                    }
+                }
+            }
+
+            return false;
+        };
+
+    };
+
+    // shorter alias, save a few bytes
+    YAHOO.util.DDM = YAHOO.util.DragDropMgr;
+    YAHOO.util.DDM._addListeners();
+
+}
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation where the linked element follows the
+ * mouse cursor.
+ *
+ * @extends DragDrop
+ * @constructor
+ * @param {String} id the id of the linked element
+ * @param {String} sGroup the group of related DragDrop items
+ */
+YAHOO.util.DD = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+    }
+};
+
+YAHOO.util.DD.prototype = new YAHOO.util.DragDrop();
+
+/**
+ * Should we auto-scroll? Defaults to true
+ *
+ * @type boolean
+ */
+YAHOO.util.DD.prototype.scroll = true;
+
+/**
+ * Sets the pointer offset to the distance between the linked element's top
+ * left corner and the location the element was clicked
+ *
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ */
+YAHOO.util.DD.prototype.autoOffset = function(iPageX, iPageY) {
+    var el = this.getEl();
+    var aCoord = YAHOO.util.Dom.getXY(el);
+    var x = iPageX - aCoord[0];
+    var y = iPageY - aCoord[1];
+    this.setDelta(x, y);
+};
+
+/**
+ * Sets the pointer offset.  You can call this directly to force the offset to
+ * be in a particular location (e.g., pass in 0,0 to set it to the center of the
+ * object, as done in ygDDSliderBG)
+ *
+ * @param {int} iDeltaX the distance from the left
+ * @param {int} iDeltaY the distance from the top
+ */
+YAHOO.util.DD.prototype.setDelta = function(iDeltaX, iDeltaY) {
+    this.deltaX = iDeltaX;
+    this.deltaY = iDeltaY;
+};
+
+/**
+ * Sets the drag element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked.  Override this if you want to place the element in a
+ * location other than where the cursor is.
+ *
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+
+YAHOO.util.DD.prototype.setDragElPos = function(iPageX, iPageY) {
+    this.alignElWithMouse(this.getDragEl(), iPageX, iPageY);
+};
+
+/**
+ * Sets the element to the location of the mousedown or click event,
+ * maintaining the cursor location relative to the location on the element
+ * that was clicked.  Override this if you want to place the element in a
+ * location other than where the cursor is.
+ *
+ * @param {HTMLElement} el the element to move
+ * @param {int} iPageX the X coordinate of the mousedown or drag event
+ * @param {int} iPageY the Y coordinate of the mousedown or drag event
+ */
+YAHOO.util.DD.prototype.alignElWithMouse = function(el, iPageX, iPageY) {
+    var oCoord = this.getTargetCoord(iPageX, iPageY);
+    var aCoord = [oCoord.x, oCoord.y];
+    YAHOO.util.Dom.setXY(el, aCoord);
+
+    this.cachePosition(oCoord.x, oCoord.y);
+
+    this.autoScroll(oCoord.x, oCoord.y, el.offsetHeight, el.offsetWidth);
+};
+
+/**
+ * Saves the most recent position so that we can reset the constraints and
+ * tick marks on-demand.  We need to know this so that we can calculate the
+ * number of pixels the element is offset from its original position.
+ */
+YAHOO.util.DD.prototype.cachePosition = function(iPageX, iPageY) {
+    if (iPageX) {
+        this.lastPageX = iPageX;
+        this.lastPageY = iPageY;
+    } else {
+        var aCoord = YAHOO.util.Dom.getXY(this.getEl());
+        this.lastPageX = aCoord[0];
+        this.lastPageY = aCoord[1];
+    }
+};
+
+/**
+ * Auto-scroll the window if the dragged object has been moved beyond the
+ * visible window boundary.
+ *
+ * @param {int} x the drag element's x position
+ * @param {int} y the drag element's y position
+ * @param {int} h the height of the drag element
+ * @param {int} w the width of the drag element
+ * @private
+ */
+YAHOO.util.DD.prototype.autoScroll = function(x, y, h, w) {
+
+    if (this.scroll) {
+        // The client height
+        var clientH = this.DDM.getClientHeight();
+
+        // The client width
+        var clientW = this.DDM.getClientWidth();
+
+        // The amt scrolled down
+        var st = this.DDM.getScrollTop();
+
+        // The amt scrolled right
+        var sl = this.DDM.getScrollLeft();
+
+        // Location of the bottom of the element
+        var bot = h + y;
+
+        // Location of the right of the element
+        var right = w + x;
+
+        // The distance from the cursor to the bottom of the visible area,
+        // adjusted so that we don't scroll if the cursor is beyond the
+        // element drag constraints
+        var toBot = (clientH + st - y - this.deltaY);
+
+        // The distance from the cursor to the right of the visible area
+        var toRight = (clientW + sl - x - this.deltaX);
+
+
+        // How close to the edge the cursor must be before we scroll
+        // var thresh = (document.all) ? 100 : 40;
+        var thresh = 40;
+
+        // How many pixels to scroll per autoscroll op.  This helps to reduce
+        // clunky scrolling. IE is more sensitive about this ... it needs this
+        // value to be higher.
+        var scrAmt = (document.all) ? 80 : 30;
+
+        // Scroll down if we are near the bottom of the visible page and the
+        // obj extends below the crease
+        if ( bot > clientH && toBot < thresh ) {
+            window.scrollTo(sl, st + scrAmt);
+        }
+
+        // Scroll up if the window is scrolled down and the top of the object
+        // goes above the top border
+        if ( y < st && st > 0 && y - st < thresh ) {
+            window.scrollTo(sl, st - scrAmt);
+        }
+
+        // Scroll right if the obj is beyond the right border and the cursor is
+        // near the border.
+        if ( right > clientW && toRight < thresh ) {
+            window.scrollTo(sl + scrAmt, st);
+        }
+
+        // Scroll left if the window has been scrolled to the right and the obj
+        // extends past the left border
+        if ( x < sl && sl > 0 && x - sl < thresh ) {
+            window.scrollTo(sl - scrAmt, st);
+        }
+    }
+};
+
+/**
+ * Finds the location the element should be placed if we want to move
+ * it to where the mouse location less the click offset would place us.
+ *
+ * @param {int} iPageX the X coordinate of the click
+ * @param {int} iPageY the Y coordinate of the click
+ * @return an object that contains the coordinates (Object.x and Object.y)
+ * @private
+ */
+YAHOO.util.DD.prototype.getTargetCoord = function(iPageX, iPageY) {
+
+
+    var x = iPageX - this.deltaX;
+    var y = iPageY - this.deltaY;
+
+    if (this.constrainX) {
+        if (x < this.minX) { x = this.minX; }
+        if (x > this.maxX) { x = this.maxX; }
+    }
+
+    if (this.constrainY) {
+        if (y < this.minY) { y = this.minY; }
+        if (y > this.maxY) { y = this.maxY; }
+    }
+
+    x = this.getTick(x, this.xTicks);
+    y = this.getTick(y, this.yTicks);
+
+
+    return {x:x, y:y};
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DD.prototype.b4MouseDown = function(e) {
+    // this.resetConstraints();
+    this.autoOffset(YAHOO.util.Event.getPageX(e),
+                        YAHOO.util.Event.getPageY(e));
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DD.prototype.b4Drag = function(e) {
+    this.setDragElPos(YAHOO.util.Event.getPageX(e),
+                        YAHOO.util.Event.getPageY(e));
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Debugging ygDragDrop events that can be overridden
+///////////////////////////////////////////////////////////////////////////////
+/*
+YAHOO.util.DD.prototype.startDrag = function(x, y) {
+};
+
+YAHOO.util.DD.prototype.onDrag = function(e) {
+};
+
+YAHOO.util.DD.prototype.onDragEnter = function(e, id) {
+};
+
+YAHOO.util.DD.prototype.onDragOver = function(e, id) {
+};
+
+YAHOO.util.DD.prototype.onDragOut = function(e, id) {
+};
+
+YAHOO.util.DD.prototype.onDragDrop = function(e, id) {
+};
+
+YAHOO.util.DD.prototype.endDrag = function(e) {
+};
+*/
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation that inserts an empty, bordered div into
+ * the document that follows the cursor during drag operations.  At the time of
+ * the click, the frame div is resized to the dimensions of the linked html
+ * element, and moved to the exact location of the linked element.
+ *
+ * @extends YAHOO.util.DD
+ * @constructor
+ * @param {String} id the id of the linked html element
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+YAHOO.util.DDProxy = function(id, sGroup) {
+    if (id) {
+        this.init(id, sGroup);
+        this.initFrame();
+    }
+};
+
+YAHOO.util.DDProxy.prototype = new YAHOO.util.DD();
+
+/**
+ * A reference to the one div element we create for all instances of this class
+ *
+ * @type Object
+ */
+YAHOO.util.DDProxy.frameDiv = null;
+
+/**
+ * the drag frame div id
+ *
+ * @type String
+ */
+YAHOO.util.DDProxy.dragElId = "ygddfdiv";
+
+/**
+ * The border width of the frame.  This is used when we resize the frame to
+ * the size of the linked element.  We substract the border width to make
+ * the div the correct size.
+ *
+ * @TODO find a better way to handle this
+ *
+ * @type int
+ */
+YAHOO.util.DDProxy.prototype.borderWidth = 2;
+
+/**
+ * By default we resize the drag frame to be the same size as the element
+ * we want to drag (this is to get the frame effect).  We can turn it off
+ * if we want a different behavior (ex: ygDDMy2)
+ *
+ * @type boolean
+ */
+YAHOO.util.DDProxy.prototype.resizeFrame = true;
+
+/**
+ * By default the frame is positioned exactly where the drag element is, so
+ * we use the cursor offset provided by YAHOO.util.DD.  Another option that works only if
+ * you do not have constraints on the obj is to have the drag frame centered
+ * around the cursor.  Set centerFrame to true for this effect.  Ex:
+ * ygDDMy2
+ *
+ * @type boolean
+ */
+YAHOO.util.DDProxy.prototype.centerFrame = false;
+
+/**
+ * Create the drag frame if needed
+ */
+YAHOO.util.DDProxy.createFrame = function() {
+    var THIS = YAHOO.util.DDProxy;
+
+    if (!document || !document.body) {
+        setTimeout(THIS.createFrame, 50);
+        return;
+    }
+
+    if (!THIS.frameDiv) {
+        THIS.frameDiv = document.createElement("div");
+        THIS.frameDiv.id = THIS.dragElId;
+        var s = THIS.frameDiv.style;
+        s.position = "absolute";
+        s.visibility = "hidden";
+        s.cursor = "move";
+        s.border = "2px solid #aaa";
+        s.zIndex = 999;
+
+        document.body.appendChild(THIS.frameDiv);
+    }
+};
+
+/**
+ * Initialization for the drag frame element.  Must be called in the
+ * constructor of all subclasses
+ */
+YAHOO.util.DDProxy.prototype.initFrame = function() {
+    YAHOO.util.DDProxy.createFrame();
+    this.setDragElId(YAHOO.util.DDProxy.dragElId);
+    this.useAbsMath = true;
+};
+
+/**
+ * Resizes the drag frame to the dimensions of the clicked object, positions
+ * it over the object, and finally displays it
+ *
+ * @param {int} iPageX X click position
+ * @param {int} iPageY Y click position
+ * @private
+ */
+YAHOO.util.DDProxy.prototype.showFrame = function(iPageX, iPageY) {
+    var el = this.getEl();
+
+    var s = this.getDragEl().style;
+
+    if (this.resizeFrame) {
+        s.width = (parseInt(el.offsetWidth) - (2*this.borderWidth)) + "px";
+        s.height = (parseInt(el.offsetHeight) - (2*this.borderWidth)) + "px";
+    }
+
+    if (this.centerFrame) {
+        this.setDelta(Math.round(parseInt(s.width)/2),
+                Math.round(parseInt(s.width)/2));
+    }
+
+    this.setDragElPos(iPageX, iPageY);
+
+    s.visibility = "";
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4MouseDown = function(e) {
+    var x = YAHOO.util.Event.getPageX(e);
+    var y = YAHOO.util.Event.getPageY(e);
+    this.autoOffset(x, y);
+    this.setDragElPos(x, y);
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4StartDrag = function(x, y) {
+    // show the drag frame
+    this.showFrame(x, y);
+};
+
+// overrides YAHOO.util.DragDrop
+YAHOO.util.DDProxy.prototype.b4EndDrag = function(e) {
+
+    // hide the drag frame
+    var s = this.getDragEl().style;
+    s.visibility = "hidden";
+};
+
+// overrides YAHOO.util.DragDrop
+// By default we try to move the element to the last location of the frame.
+// This is so that the default behavior mirrors that of YAHOO.util.DD.
+YAHOO.util.DDProxy.prototype.endDrag = function(e) {
+    var lel = this.getEl();
+    var del = this.getDragEl();
+
+    // Show the drag frame briefly so we can get its position
+    del.style.visibility = "";
+
+    // Hide the linked element before the move to get around a Safari
+    // rendering bug.
+    lel.style.visibility = "hidden";
+    YAHOO.util.DDM.moveToEl(lel, del);
+    del.style.visibility = "hidden";
+    lel.style.visibility = "";
+};
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+/**
+ * @class a DragDrop implementation that does not move, but can be a drop
+ * target.  You would get the same result by simply omitting implementation
+ * for the event callbacks, but this way we reduce the processing cost of the
+ * event listener and the callbacks.
+ *
+ * @extends YAHOO.util.DragDrop
+ * @constructor
+ * @param {String} id the id of the element that is a drop target
+ * @param {String} sGroup the group of related DragDrop objects
+ */
+
+YAHOO.util.DDTarget = function(id, sGroup) {
+    if (id) {
+        this.initTarget(id, sGroup);
+    }
+};
+
+YAHOO.util.DDTarget.prototype = new YAHOO.util.DragDrop();
+
diff --git a/web/build/event.js b/web/build/event.js
new file mode 100644
index 000000000..9bca02e4e
--- /dev/null
+++ b/web/build/event.js
@@ -0,0 +1,901 @@
+/*
+Copyright (c) 2006 Yahoo! Inc. All rights reserved.
+version 0.9.0
+*/
+
+/**
+ * @class The CustomEvent class lets you define events for your application
+ * that can be subscribed to by one or more independent component.
+ * @param {String} type The type of event, which is passed to the callback
+ *                 when the event fires
+ * @param {Object} oScope The context the event will fire from.  "this" will
+ *                 refer to this object in the callback.  Default value:
+ *                 the window object.  The listener can override this.
+ * @constructor
+ */
+YAHOO.util.CustomEvent = function(type, oScope) {
+    /**
+     * The type of event, returned to subscribers when the event fires
+     * @type string
+     */
+    this.type = type;
+
+    /**
+     * The scope the the event will fire from.  Defaults to the window obj
+     * @type object
+     */
+    this.scope = oScope || window;
+
+    /**
+     * The subscribers to this event
+     * @type array
+     */
+    this.subscribers = [];
+
+    // Register with the event utility for automatic cleanup.  Made optional
+    // so that CustomEvent can be used independently of pe.event
+    if (YAHOO.util["Event"]) {
+        YAHOO.util.Event.regCE(this);
+    }
+};
+
+YAHOO.util.CustomEvent.prototype = {
+    /**
+     * Subscribes the caller to this event
+     * @param {Function} fn       The function to execute
+     * @param {Object}   obj      An object to be passed along when the event fires
+     * @param {boolean}  bOverride If true, the obj passed in becomes the execution
+     *                            scope of the listener
+     */
+    subscribe: function(fn, obj, bOverride) {
+        this.subscribers.push( new YAHOO.util.Subscriber(fn, obj, bOverride) );
+    },
+
+    /**
+     * Unsubscribes the caller from this event
+     * @param {Function} fn  The function to execute
+     * @param {Object}   obj An object to be passed along when the event fires
+     * @return {boolean} True if the subscriber was found and detached.
+     */
+    unsubscribe: function(fn, obj) {
+        var found = false;
+        for (var i=0; i<this.subscribers.length; ++i) {
+            var s = this.subscribers[i];
+            if (s && s.contains(fn, obj)) {
+                this._delete(i);
+                found = true;
+            }
+        }
+
+        return found;
+    },
+
+    /**
+     * Notifies the subscribers.  The callback functions will be executed
+     * from the scope specified when the event was created, and with the following
+     * parameters:
+     *   <pre>
+     *   - The type of event
+     *   - All of the arguments fire() was executed with as an array
+     *   - The custom object (if any) that was passed into the subscribe() method
+     *   </pre>
+     *
+     * @param {Array} an arbitrary set of parameters to pass to the handler
+     */
+    fire: function() {
+        for (var i=0; i<this.subscribers.length; ++i) {
+            var s = this.subscribers[i];
+            if (s) {
+                var scope = (s.override) ? s.obj : this.scope;
+                s.fn.call(scope, this.type, arguments, s.obj);
+            }
+        }
+    },
+
+    /**
+     * Removes all listeners
+     */
+    unsubscribeAll: function() {
+        for (var i=0; i<this.subscribers.length; ++i) {
+            this._delete(i);
+        }
+    },
+
+    /**
+     * @private
+     */
+    _delete: function(index) {
+        var s = this.subscribers[index];
+        if (s) {
+            delete s.fn;
+            delete s.obj;
+        }
+
+        delete this.subscribers[index];
+    }
+};
+
+/////////////////////////////////////////////////////////////////////
+
+/**
+ * @class
+ * @param {Function} fn       The function to execute
+ * @param {Object}   obj      An object to be passed along when the event fires
+ * @param {boolean}  bOverride If true, the obj passed in becomes the execution
+ *                            scope of the listener
+ * @constructor
+ */
+YAHOO.util.Subscriber = function(fn, obj, bOverride) {
+    /**
+     * The callback that will be execute when the event fires
+     * @type function
+     */
+    this.fn = fn;
+
+    /**
+     * An optional custom object that will passed to the callback when
+     * the event fires
+     * @type object
+     */
+    this.obj = obj || null;
+
+    /**
+     * The default execution scope for the event listener is defined when the
+     * event is created (usually the object which contains the event).
+     * By setting override to true, the execution scope becomes the custom
+     * object passed in by the subscriber
+     * @type boolean
+     */
+    this.override = (bOverride);
+};
+
+/**
+ * Returns true if the fn and obj match this objects properties.
+ * Used by the unsubscribe method to match the right subscriber.
+ *
+ * @param {Function} fn the function to execute
+ * @param {Object} obj an object to be passed along when the event fires
+ * @return {boolean} true if the supplied arguments match this
+ *                   subscriber's signature.
+ */
+YAHOO.util.Subscriber.prototype.contains = function(fn, obj) {
+    return (this.fn == fn && this.obj == obj);
+};
+
+/* Copyright (c) 2006 Yahoo! Inc. All rights reserved. */
+
+// Only load this library once.  If it is loaded a second time, existing
+// events cannot be detached.
+if (!YAHOO.util.Event) {
+
+/**
+ * The event utility provides functions to add and remove event listeners,
+ * event cleansing.  It also tries to automatically remove listeners it
+ * registers during the unload event.
+ * @class
+ * @constructor
+ */
+    YAHOO.util.Event = function() {
+
+        /**
+         * True after the onload event has fired
+         * @type boolean
+         * @private
+         */
+        var loadComplete =  false;
+
+        /**
+         * Cache of wrapped listeners
+         * @type array
+         * @private
+         */
+        var listeners = [];
+
+        /**
+         * Listeners that will be attached during the onload event
+         * @type array
+         * @private
+         */
+        var delayedListeners = [];
+
+        /**
+         * User-defined unload function that will be fired before all events
+         * are detached
+         * @type array
+         * @private
+         */
+        var unloadListeners = [];
+
+        /**
+         * Cache of the custom events that have been defined.  Used for
+         * automatic cleanup
+         * @type array
+         * @private
+         */
+        var customEvents = [];
+
+        /**
+         * Cache of DOM0 event handlers to work around issues with DOM2 events
+         * in Safari
+         * @private
+         */
+        var legacyEvents = [];
+
+        /**
+         * Listener stack for DOM0 events
+         * @private
+         */
+        var legacyHandlers = [];
+
+        return { // PREPROCESS
+
+            /**
+             * Element to bind, int constant
+             * @type int
+             */
+            EL: 0,
+
+            /**
+             * Type of event, int constant
+             * @type int
+             */
+            TYPE: 1,
+
+            /**
+             * Function to execute, int constant
+             * @type int
+             */
+            FN: 2,
+
+            /**
+             * Function wrapped for scope correction and cleanup, int constant
+             * @type int
+             */
+            WFN: 3,
+
+            /**
+             * Object passed in by the user that will be returned as a
+             * parameter to the callback, int constant
+             * @type int
+             */
+            SCOPE: 3,
+
+            /**
+             * Adjusted scope, either the element we are registering the event
+             * on or the custom object passed in by the listener, int constant
+             * @type int
+             */
+            ADJ_SCOPE: 4,
+
+            /**
+             * Safari detection is necessary to work around the preventDefault
+             * bug that makes it so you can't cancel a href click from the
+             * handler.  There is not a capabilities check we can use here.
+             * @private
+             */
+            isSafari: (navigator.userAgent.match(/safari/gi)),
+
+            /**
+             * @private
+             * IE detection needed to properly calculate pageX and pageY.
+             * capabilities checking didn't seem to work because another
+             * browser that does not provide the properties have the values
+             * calculated in a different manner than IE.
+             */
+            isIE: (!this.isSafari && navigator.userAgent.match(/msie/gi)),
+
+            /**
+             * Appends an event handler
+             *
+             * @param {Object}   el        The html element to assign the
+             *                             event to
+             * @param {String}   sType     The type of event to append
+             * @param {Function} fn        The method the event invokes
+             * @param {Object}   oScope    An arbitrary object that will be
+             *                             passed as a parameter to the handler
+             * @param {boolean}  bOverride If true, the obj passed in becomes
+             *                             the execution scope of the listener
+             * @return {boolean} True if the action was successful or defered,
+             *                        false if one or more of the elements
+             *                        could not have the event bound to it.
+             */
+            addListener: function(el, sType, fn, oScope, bOverride) {
+
+                // The el argument can be an array of elements or element ids.
+                if ( this._isValidCollection(el)) {
+                    var ok = true;
+                    for (var i=0; i< el.length; ++i) {
+                        ok = ( this.on(el[i],
+                                       sType,
+                                       fn,
+                                       oScope,
+                                       bOverride) && ok );
+                    }
+                    return ok;
+
+                } else if (typeof el == "string") {
+                    // If the el argument is a string, we assume it is
+                    // actually the id of the element.  If the page is loaded
+                    // we convert el to the actual element, otherwise we
+                    // defer attaching the event until onload event fires
+
+                    // check to see if we need to delay hooking up the event
+                    // until after the page loads.
+                    if (loadComplete) {
+                        el = this.getEl(el);
+                    } else {
+                        // defer adding the event until onload fires
+                        delayedListeners[delayedListeners.length] =
+                            [el, sType, fn, oScope, bOverride];
+
+                        return true;
+                    }
+                }
+
+                // Element should be an html element or an array if we get
+                // here.
+                if (!el) {
+                    return false;
+                }
+
+                // we need to make sure we fire registered unload events
+                // prior to automatically unhooking them.  So we hang on to
+                // these instead of attaching them to the window and fire the
+                // handles explicitly during our one unload event.
+                if ("unload" == sType && oScope !== this) {
+                    unloadListeners[unloadListeners.length] =
+                            [el, sType, fn, oScope, bOverride];
+                    return true;
+                }
+
+
+                // if the user chooses to override the scope, we use the custom
+                // object passed in, otherwise the executing scope will be the
+                // HTML element that the event is registered on
+                var scope = (bOverride) ? oScope : el;
+
+                // wrap the function so we can return the oScope object when
+                // the event fires;
+                var wrappedFn = function(e) {
+                        return fn.call(scope, YAHOO.util.Event.getEvent(e),
+                                oScope);
+                    };
+
+                var li = [el, sType, fn, wrappedFn, scope];
+                var index = listeners.length;
+                // cache the listener so we can try to automatically unload
+                listeners[index] = li;
+
+                if (this.useLegacyEvent(el, sType)) {
+                    var legacyIndex = this.getLegacyIndex(el, sType);
+                    if (legacyIndex == -1) {
+
+                        legacyIndex = legacyEvents.length;
+                        // cache the signature for the DOM0 event, and
+                        // include the existing handler for the event, if any
+                        legacyEvents[legacyIndex] =
+                            [el, sType, el["on" + sType]];
+                        legacyHandlers[legacyIndex] = [];
+
+                        el["on" + sType] =
+                            function(e) {
+                                YAHOO.util.Event.fireLegacyEvent(
+                                    YAHOO.util.Event.getEvent(e), legacyIndex);
+                            };
+                    }
+
+                    // add a reference to the wrapped listener to our custom
+                    // stack of events
+                    legacyHandlers[legacyIndex].push(index);
+
+                // DOM2 Event model
+                } else if (el.addEventListener) {
+                    el.addEventListener(sType, wrappedFn, false);
+                // Internet Explorer abstraction
+                } else if (el.attachEvent) {
+                    el.attachEvent("on" + sType, wrappedFn);
+                }
+
+                return true;
+
+            },
+
+            /**
+             * Shorthand for YAHOO.util.Event.addListener
+             * @type function
+             */
+            // on: this.addListener,
+
+            /**
+             * When using legacy events, the handler is routed to this object
+             * so we can fire our custom listener stack.
+             * @private
+             */
+            fireLegacyEvent: function(e, legacyIndex) {
+                // alert("fireLegacyEvent " + legacyIndex);
+                var ok = true;
+
+                // var el = legacyEvents[YAHOO.util.Event.EL];
+
+                /* this is not working because the property may get populated
+                // fire the event we replaced, if it exists
+                var origHandler = legacyEvents[2];
+                alert(origHandler);
+                if (origHandler && origHandler.call) {
+                    var ret = origHandler.call(el, e);
+                    ok = (ret);
+                }
+                */
+
+                var le = legacyHandlers[legacyIndex];
+                for (i=0; i < le.length; ++i) {
+                    var index = le[i];
+                    // alert(index);
+                    if (index) {
+                        var li = listeners[index];
+                        var scope = li[this.ADJ_SCOPE];
+                        var ret = li[this.WFN].call(scope, e);
+                        ok = (ok && ret);
+                        // alert(ok);
+                    }
+                }
+
+                return ok;
+            },
+
+            /**
+             * Returns the legacy event index that matches the supplied
+             * signature
+             * @private
+             */
+            getLegacyIndex: function(el, sType) {
+                for (var i=0; i < legacyEvents.length; ++i) {
+                    var le = legacyEvents[i];
+                    if (le && le[0] == el && le[1] == sType) {
+                        return i;
+                    }
+                }
+
+                return -1;
+            },
+
+            /**
+             * Logic that determines when we should automatically use legacy
+             * events instead of DOM2 events.
+             * @private
+             */
+            useLegacyEvent: function(el, sType) {
+
+                return ( (!el.addEventListener && !el.attachEvent) ||
+                                (sType == "click" && this.isSafari) );
+            },
+
+            /**
+             * Removes an event handler
+             *
+             * @param {Object} el the html element or the id of the element to
+             * assign the event to.
+             * @param {String} sType the type of event to remove
+             * @param {Function} fn the method the event invokes
+             * @return {boolean} true if the unbind was successful, false
+             * otherwise
+             */
+            removeListener: function(el, sType, fn) {
+
+                // The el argument can be a string
+                if (typeof el == "string") {
+                    el = this.getEl(el);
+                // The el argument can be an array of elements or element ids.
+                } else if ( this._isValidCollection(el)) {
+                    var ok = true;
+                    for (var i=0; i< el.length; ++i) {
+                        ok = ( this.removeListener(el[i], sType, fn) && ok );
+                    }
+                    return ok;
+                }
+
+                var cacheItem = null;
+                var index = this._getCacheIndex(el, sType, fn);
+
+                if (index >= 0) {
+                    cacheItem = listeners[index];
+                }
+
+                if (!el || !cacheItem) {
+                    return false;
+                }
+
+
+                if (el.removeEventListener) {
+                    el.removeEventListener(sType, cacheItem[this.WFN], false);
+                    // alert("adsf");
+                } else if (el.detachEvent) {
+                    el.detachEvent("on" + sType, cacheItem[this.WFN]);
+                }
+
+                // removed the wrapped handler
+                delete listeners[index][this.WFN];
+                delete listeners[index][this.FN];
+                delete listeners[index];
+
+                return true;
+
+            },
+
+            /**
+             * Returns the event's target element
+             * @param {Event} ev the event
+             * @param {boolean} resolveTextNode when set to true the target's
+             *                  parent will be returned if the target is a
+             *                  text node
+             * @return {HTMLElement} the event's target
+             */
+            getTarget: function(ev, resolveTextNode) {
+                var t = ev.target || ev.srcElement;
+
+                if (resolveTextNode && t && "#text" == t.nodeName) {
+                    return t.parentNode;
+                } else {
+                    return t;
+                }
+            },
+
+            /**
+             * Returns the event's pageX
+             * @param {Event} ev the event
+             * @return {int} the event's pageX
+             */
+            getPageX: function(ev) {
+                var x = ev.pageX;
+                if (!x && 0 !== x) {
+                    x = ev.clientX || 0;
+
+                    if ( this.isIE ) {
+                        x += this._getScrollLeft();
+                    }
+                }
+
+                return x;
+            },
+
+            /**
+             * Returns the event's pageY
+             * @param {Event} ev the event
+             * @return {int} the event's pageY
+             */
+            getPageY: function(ev) {
+                var y = ev.pageY;
+                if (!y && 0 !== y) {
+                    y = ev.clientY || 0;
+
+                    if ( this.isIE ) {
+                        y += this._getScrollTop();
+                    }
+                }
+
+                return y;
+            },
+
+            /**
+             * Returns the event's related target
+             * @param {Event} ev the event
+             * @return {HTMLElement} the event's relatedTarget
+             */
+            getRelatedTarget: function(ev) {
+                var t = ev.relatedTarget;
+                if (!t) {
+                    if (ev.type == "mouseout") {
+                        t = ev.toElement;
+                    } else if (ev.type == "mouseover") {
+                        t = ev.fromElement;
+                    }
+                }
+
+                return t;
+            },
+
+            /**
+             * Returns the time of the event.  If the time is not included, the
+             * event is modified using the current time.
+             * @param {Event} ev the event
+             * @return {Date} the time of the event
+             */
+            getTime: function(ev) {
+                if (!ev.time) {
+                    var t = new Date().getTime();
+                    try {
+                        ev.time = t;
+                    } catch(e) {
+                        // can't set the time property
+                        return t;
+                    }
+                }
+
+                return ev.time;
+            },
+
+            /**
+             * Convenience method for stopPropagation + preventDefault
+             * @param {Event} ev the event
+             */
+            stopEvent: function(ev) {
+                this.stopPropagation(ev);
+                this.preventDefault(ev);
+            },
+
+            /**
+             * Stops event propagation
+             * @param {Event} ev the event
+             */
+            stopPropagation: function(ev) {
+                if (ev.stopPropagation) {
+                    ev.stopPropagation();
+                } else {
+                    ev.cancelBubble = true;
+                }
+            },
+
+            /**
+             * Prevents the default behavior of the event
+             * @param {Event} ev the event
+             */
+            preventDefault: function(ev) {
+                if (ev.preventDefault) {
+                    ev.preventDefault();
+                } else {
+                    ev.returnValue = false;
+                }
+            },
+
+            /**
+             * Returns the event, should not be necessary for user to call
+             * @param {Event} the event parameter from the handler
+             * @return {Event} the event
+             */
+            getEvent: function(e) {
+                var ev = e || window.event;
+
+                if (!ev) {
+                    var c = this.getEvent.caller;
+                    while (c) {
+                        ev = c.arguments[0];
+                        if (ev && Event == ev.constructor) {
+                            break;
+                        }
+                        c = c.caller;
+                    }
+                }
+
+                return ev;
+            },
+
+            /**
+             * Returns the charcode for an event
+             * @param {Event} ev the event
+             * @return {int} the event's charCode
+             */
+            getCharCode: function(ev) {
+                return ev.charCode || (ev.type == "keypress") ? ev.keyCode : 0;
+            },
+
+            /**
+             * @private
+             * Locating the saved event handler data by function ref
+             */
+            _getCacheIndex: function(el, sType, fn) {
+                for (var i=0; i< listeners.length; ++i) {
+                    var li = listeners[i];
+                    if ( li                 &&
+                         li[this.FN] == fn  &&
+                         li[this.EL] == el  &&
+                         li[this.TYPE] == sType ) {
+                        return i;
+                    }
+                }
+
+                return -1;
+            },
+
+            /**
+             * We want to be able to use getElementsByTagName as a collection
+             * to attach a group of events to.  Unfortunately, different
+             * browsers return different types of collections.  This function
+             * tests to determine if the object is array-like.  It will also
+             * fail if the object is an array, but is empty.
+             * @param o the object to test
+             * @return {boolean} true if the object is array-like and populated
+             */
+            _isValidCollection: function(o) {
+                // alert(o.constructor.toString())
+                // alert(typeof o)
+
+                return ( o                    && // o is something
+                         o.length             && // o is indexed
+                         typeof o != "string" && // o is not a string
+                         !o.tagName           && // o is not an HTML element
+                         !o.alert             && // o is not a window
+                         typeof o[0] != "undefined" );
+
+            },
+
+            /**
+             * @private
+             * DOM element cache
+             */
+            elCache: {},
+
+            /**
+             * We cache elements bound by id because when the unload event
+             * fires, we can no longer use document.getElementById
+             * @private
+             */
+            getEl: function(id) {
+                /*
+                // this is a problem when replaced via document.getElementById
+                if (! this.elCache[id]) {
+                    try {
+                        var el = document.getElementById(id);
+                        if (el) {
+                            this.elCache[id] = el;
+                        }
+                    } catch (er) {
+                    }
+                }
+                return this.elCache[id];
+                */
+
+                return document.getElementById(id);
+            },
+
+            /**
+             * Clears the element cache
+             */
+            clearCache: function() {
+                for (i in this.elCache) {
+                    delete this.elCache[i];
+                }
+            },
+
+            /**
+             * Called by CustomEvent instances to provide a handle to the
+             * event * that can be removed later on.  Should be package
+             * protected.
+             * @private
+             */
+            regCE: function(ce) {
+                customEvents.push(ce);
+            },
+
+            /**
+             * @private
+             * hook up any deferred listeners
+             */
+            _load: function(e) {
+                loadComplete = true;
+            },
+
+            /**
+             * Polling function that runs before the onload event fires,
+             * attempting * to attach to DOM Nodes as soon as they are
+             * available
+             * @private
+             */
+            _tryPreloadAttach: function() {
+
+                // keep trying until after the page is loaded.  We need to
+                // check the page load state prior to trying to bind the
+                // elements so that we can be certain all elements have been
+                // tested appropriately
+                var tryAgain = !loadComplete;
+
+                for (var i=0; i < delayedListeners.length; ++i) {
+                    var d = delayedListeners[i];
+                    // There may be a race condition here, so we need to
+                    // verify the array element is usable.
+                    if (d) {
+
+                        // el will be null if document.getElementById did not
+                        // work
+                        var el = this.getEl(d[this.EL]);
+
+                        if (el) {
+                            this.on(el, d[this.TYPE], d[this.FN],
+                                    d[this.SCOPE], d[this.ADJ_SCOPE]);
+                            delete delayedListeners[i];
+                        }
+                    }
+                }
+
+                if (tryAgain) {
+                    setTimeout("YAHOO.util.Event._tryPreloadAttach()", 50);
+                }
+            },
+
+            /**
+             * Removes all listeners registered by pe.event.  Called
+             * automatically during the unload event.
+             */
+            _unload: function(e, me) {
+                for (var i=0; i < unloadListeners.length; ++i) {
+                    var l = unloadListeners[i];
+                    if (l) {
+                        var scope = (l[this.ADJ_SCOPE]) ? l[this.SCOPE]: window;
+                        l[this.FN].call(scope, this.getEvent(e), l[this.SCOPE] );
+                    }
+                }
+
+                if (listeners && listeners.length > 0) {
+                    for (i = 0; i < listeners.length; ++i) {
+                        l = listeners[i];
+                        if (l) {
+                            this.removeListener(l[this.EL], l[this.TYPE],
+                                    l[this.FN]);
+                        }
+                    }
+
+                    this.clearCache();
+                }
+
+                for (i = 0; i < customEvents.length; ++i) {
+                    customEvents[i].unsubscribeAll();
+                    delete customEvents[i];
+                }
+
+                for (i = 0; i < legacyEvents.length; ++i) {
+                    // dereference the element
+                    delete legacyEvents[i][0];
+                    // delete the array item
+                    delete legacyEvents[i];
+                }
+            },
+
+            /**
+             * Returns scrollLeft
+             * @private
+             */
+            _getScrollLeft: function() {
+                return this._getScroll()[1];
+            },
+
+            /**
+             * Returns scrollTop
+             * @private
+             */
+            _getScrollTop: function() {
+                return this._getScroll()[0];
+            },
+
+            /**
+             * Returns the scrollTop and scrollLeft.  Used to calculate the
+             * pageX and pageY in Internet Explorer
+             * @private
+             */
+            _getScroll: function() {
+                var dd = document.documentElement; db = document.body;
+                if (dd && dd.scrollTop) {
+                    return [dd.scrollTop, dd.scrollLeft];
+                } else if (db) {
+                    return [db.scrollTop, db.scrollLeft];
+                } else {
+                    return [0, 0];
+                }
+            }
+        };
+    } ();
+
+    YAHOO.util.Event.on = YAHOO.util.Event.addListener;
+
+    if (document && document.body) {
+        YAHOO.util.Event._load();
+    } else {
+        YAHOO.util.Event.on(window, "load", YAHOO.util.Event._load,
+                YAHOO.util.Event, true);
+    }
+
+    YAHOO.util.Event.on(window, "unload", YAHOO.util.Event._unload,
+                YAHOO.util.Event, true);
+
+    YAHOO.util.Event._tryPreloadAttach();
+
+}
+
diff --git a/web/css.css b/web/css.css
new file mode 100644
index 000000000..9afb752d0
--- /dev/null
+++ b/web/css.css
@@ -0,0 +1,40 @@
+body {
+    font-family: "Gill Sans", "Gill Sans MT", sans-serif;
+}
+h1 {
+    text-align: right;
+    border-bottom: solid 1px #999999;
+    margin: 0;
+}
+#map {
+    border: solid 1px #000000;
+    width: 500px;
+    height: 500px;
+    position: relative;
+    top: 0;
+    left: 5em;
+    overflow: hidden;
+}
+#drag {
+    width: 1em;
+    height: 1em;
+    position: absolute;
+    top: 0;
+    left: 0;
+}
+#drag img {
+    position: absolute;
+}
+#log {
+    border: solid 1px #ff0000;
+    padding: 3px;
+    font-size: 83%;
+}
+#wrap {
+}
+#column {
+    float: left;
+}
+#compass img {
+    border: 0;
+}
diff --git a/web/i/arrow-east.gif b/web/i/arrow-east.gif
new file mode 100644
index 000000000..132bd9346
--- /dev/null
+++ b/web/i/arrow-east.gif
diff --git a/web/i/arrow-north.gif b/web/i/arrow-north.gif
new file mode 100644
index 000000000..2e0422f52
--- /dev/null
+++ b/web/i/arrow-north.gif
diff --git a/web/i/arrow-northeast.gif b/web/i/arrow-northeast.gif
new file mode 100644
index 000000000..08546cc25
--- /dev/null
+++ b/web/i/arrow-northeast.gif
diff --git a/web/i/arrow-northwest.gif b/web/i/arrow-northwest.gif
new file mode 100644
index 000000000..d682da8d2
--- /dev/null
+++ b/web/i/arrow-northwest.gif
diff --git a/web/i/arrow-south.gif b/web/i/arrow-south.gif
new file mode 100644
index 000000000..1c3f281f8
--- /dev/null
+++ b/web/i/arrow-south.gif
diff --git a/web/i/arrow-southeast.gif b/web/i/arrow-southeast.gif
new file mode 100644
index 000000000..11af4752d
--- /dev/null
+++ b/web/i/arrow-southeast.gif
diff --git a/web/i/arrow-southwest.gif b/web/i/arrow-southwest.gif
new file mode 100644
index 000000000..41e483150
--- /dev/null
+++ b/web/i/arrow-southwest.gif
diff --git a/web/i/arrow-west.gif b/web/i/arrow-west.gif
new file mode 100644
index 000000000..12a335b12
--- /dev/null
+++ b/web/i/arrow-west.gif
diff --git a/web/i/pin_red.png b/web/i/pin_red.png
new file mode 100644
index 000000000..f960799b3
--- /dev/null
+++ b/web/i/pin_red.png
diff --git a/web/i/pin_shadow.png b/web/i/pin_shadow.png
new file mode 100644
index 000000000..3a89759fc
--- /dev/null
+++ b/web/i/pin_shadow.png
diff --git a/web/i/pin_yellow.png b/web/i/pin_yellow.png
new file mode 100644
index 000000000..26e8a9d13
--- /dev/null
+++ b/web/i/pin_yellow.png
diff --git a/web/i/rose.gif b/web/i/rose.gif
new file mode 100644
index 000000000..cceaaad7b
--- /dev/null
+++ b/web/i/rose.gif
diff --git a/web/i/zoomin.gif b/web/i/zoomin.gif
new file mode 100644
index 000000000..32ced670b
--- /dev/null
+++ b/web/i/zoomin.gif
diff --git a/web/i/zoomout.gif b/web/i/zoomout.gif
new file mode 100644
index 000000000..8de898bb2
--- /dev/null
+++ b/web/i/zoomout.gif
diff --git a/web/index.php b/web/index.php
new file mode 100644
index 000000000..d9c952331
--- /dev/null
+++ b/web/index.php
@@ -0,0 +1,91 @@
+<?
+/*
+ * index.php:
+ * Main code for BCI - not really.
+ *
+ * Copyright (c) 2006 UK Citizens Online Democracy. All rights reserved.
+ * Email: matthew@mysociety.org. WWW: http://www.mysociety.org
+ *
+ * $Id: index.php,v 1.1 2006-09-19 15:08:37 matthew Exp $
+ *
+ */
+
+$x = intval($_GET['x']) ? intval($_GET['x']) : 62;
+$y = intval($_GET['y']) ? intval($_GET['y']) : 171;
+$zoom = intval($_GET['z']) ? intval($_GET['z']) : 250;
+if ($zoom == 25) {
+    $dir = 'tl/';
+} else {
+    $dir = 't/';
+}
+$tl = $dir.$x.'.'.$y.'.png';
+$tr = $dir.($x+1).'.'.$y.'.png';
+$bl = $dir.$x.'.'.($y+1).'.png';
+$br = $dir.($x+1).'.'.($y+1).'.png';
+
+function url($x, $y, $z = null) {
+    global $zoom;
+    if (!$z) $z = $zoom;
+    return '?x=' . $x . '&amp;y=' . $y . '&amp;z=' . $z;
+}
+?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en-gb">
+    <head>
+        <title>MapOS testing</title>
+        <script type="text/javascript" src="build/YAHOO.js"></script>
+        <script type="text/javascript" src="build/dom.js"></script>
+        <script type="text/javascript" src="build/event.js"></script>
+        <script type="text/javascript" src="build/animation.js"></script>
+        <script type="text/javascript">
+        var x = <?=$x ?>;
+        var y = <?=$y ?>;
+        </script>
+        <script type="text/javascript" src="js.js"></script>
+        <style type="text/css">@import url("css.css");</style>
+    </head>
+    <body>
+        <h1>MapOS</h1>
+        <p>Drag to move, double-click to centre, or use the arrows. Zoom's a bit of a jump (250,000:1 to 25,000:1 and back) but should be okay - if you double-click just before a zoom in, that's probably best.
+        <strong>Bugs:</strong> None at this immediate moment</p>
+        <div id="wrap">
+        <div id="column">
+
+<table cellpadding="0" cellspacing="0" border="0" id="compass">
+<tr valign="bottom">
+<td align="right"><a href="<?=url($x-1,$y-1)?>"><img src="i/arrow-northwest.gif" alt="NW"></a></td>
+<td align="center"><a href="<?=url($x, $y-1)?>"><img src="i/arrow-north.gif" vspace="3" alt="N"></a></td>
+<td><a href="<?=url($x+1,$y-1)?>"><img src="i/arrow-northeast.gif" alt="NE"></a></td>
+</tr>
+<tr>
+<td><a href="<?=url($x-1,$y)?>"><img src="i/arrow-west.gif" hspace="3" alt="W"></a></td>
+<td align="center"><img src="i/rose.gif" alt=""></a></td>
+<td><a href="<?=url($x+1,$y)?>"><img src="i/arrow-east.gif" hspace="3" alt="E"></a></td>
+</tr>
+<tr valign="top">
+<td align="right"><a href="<?=url($x-1,$y+1)?>"><img src="i/arrow-southwest.gif" alt="SW"></a></td>
+<td align="center"><a href="<?=url($x,$y+1)?>"><img src="i/arrow-south.gif" vspace="3" alt="S"></a></td>
+<td><a href="<?=url($x+1,$y+1)?>"><img src="i/arrow-southeast.gif" alt="SE"></a></td>
+</tr>
+</table>
+
+<p id="zoom" align="center">
+<?  if ($zoom != 250) { ?>
+<a href="<?=url(round($x/10)-1,round($y/10)-1,250)?>"><img src="i/zoomout.gif" alt="Zoom out" border="0"></a>
+<?  }
+    if ($zoom != 25) { ?>
+<a href="<?=url(($x+1)*10,($y+1)*10,25)?>"><img src="i/zoomin.gif" alt="Zoom in" border="0"></a>
+<?  } ?>
+</p>
+
+        <div id="log"></div>
+        </div>
+        <div id="map">
+            <div id="drag">
+                <img id="2.2" nm="<?=$tl?>" src="<?=$tl?>" style="top:0px; left:0px;"><img id="3.2" nm="<?=$tr?>" src="<?=$tr?>" style="top:0px; left:250px;"><br><img id="2.3" nm="<?=$bl?>" src="<?=$bl?>" style="top:250px; left:0px;"><img id="3.3" nm="<?=$br?>" src="<?=$br?>" style="top:250px; left:250px;">
+            </div>
+        </div>
+        </div>
+    </body>
+</html>
+
diff --git a/web/js.js b/web/js.js
new file mode 100644
index 000000000..81b979b7a
--- /dev/null
+++ b/web/js.js
@@ -0,0 +1,327 @@
+window.onload = init;
+var mapFOO;
+var log;
+function init() {
+    log = new Log('log');
+    log.log('<em>Debug log</em>');
+    map = new Map('map');
+}
+
+function Map(m) {
+    // Public variables
+    this.map = document.getElementById(m);
+    this.pos = YAHOO.util.Dom.getXY(this.map);
+    this.width = this.map.offsetWidth - 2;
+    this.height = this.map.offsetHeight - 2;
+    this.tilewidth = 250;
+    this.tileheight = 250;
+    if (this.width != 500 || this.height != 500) {
+        return false;
+    }
+    this.point = new Point();
+    this.zoomed = false;
+    this.drag = this.map.getElementsByTagName('div')[0];
+
+    // Private variables
+    var drag_x = 0;
+    var drag_y = 0;
+    var self = this;
+
+    // Event handlers
+    this.map.onmousedown = associateObjWithEvent(this, 'drag_start');
+//    this.map.ondblclick = associateObjWithEvent(this, 'centre');
+    this.map.onclick = associateObjWithEvent(this, 'add_pin');
+    document.onmouseout = associateObjWithEvent(this, 'drag_end_out');
+
+    // Set up event handlers on links
+    var points = document.getElementById('compass').getElementsByTagName('a');
+    points[1].onclick = function() { self.pan(0,self.tileheight); return false; };
+    points[3].onclick = function() { self.pan(self.tilewidth,0); return false; };
+    points[4].onclick = function() { self.pan(-self.tilewidth,0); return false; };
+    points[6].onclick = function() { self.pan(0,-self.tileheight); return false; };
+    points[0].onclick = function() { self.pan(self.tilewidth,self.tileheight); return false; };
+    points[2].onclick = function() { self.pan(-self.tilewidth,self.tileheight); return false; };
+    points[5].onclick = function() { self.pan(self.tilewidth,-self.tileheight); return false; };
+    points[7].onclick = function() { self.pan(-self.tilewidth,-self.tileheight); return false; };
+
+    var zoom = document.getElementById('zoom').getElementsByTagName('img')[0];
+    if (zoom.alt == 'Zoom out') {
+        this.zoomed = true;
+    }
+    zoom.onclick = function() {
+        if (!self.zoomed) {
+            this.src = 'i/zoomout.gif';
+            self.zoomed = true;
+            self.zoom_change(10);
+        } else {
+            self.zoomed = false;
+            this.src = 'i/zoomin.gif';
+            self.zoom_change(0.1);
+        }
+        return false;
+    };
+
+    /*
+    points[0].style.top = (this.pos[1]-13) + 'px'
+    points[1].style.top = (this.pos[1]-13) + 'px'
+    points[2].style.top = (this.pos[1]-13) + 'px'
+    points[0].style.left = (this.pos[0]-13) + 'px'
+    points[3].style.left = (this.pos[0]-13) + 'px'
+    points[5].style.left = (this.pos[0]-13) + 'px'
+    points[1].style.left = (this.pos[0]+this.width/2-6) + 'px'
+    points[6].style.left = (this.pos[0]+this.width/2-6) + 'px'
+    points[3].style.top = (this.pos[1]+this.height/2) + 'px'
+    points[4].style.top = (this.pos[1]+this.height/2) + 'px'
+    points[2].style.left = (this.pos[0]+this.width) + 'px'
+    points[4].style.left = (this.pos[0]+this.width) + 'px'
+    points[7].style.left = (this.pos[0]+this.width) + 'px'
+    points[5].style.top = (this.pos[1]+this.height) + 'px'
+    points[6].style.top = (this.pos[1]+this.height) + 'px'
+    points[7].style.top = (this.pos[1]+this.height) + 'px'
+    */
+
+    function image_rotate(img, x, y) {
+        if (x) {
+            img.style.left = (img.offsetLeft + x*250) + 'px';
+            img.xx += x;
+        }
+        if (y) {
+            img.style.top = (img.offsetTop + y*250) + 'px';
+            img.yy += y;
+        }
+        var url = img.xx + '.' + img.yy + '.png';
+        if (self.zoomed) {
+            url = 'tl/' + url;
+        } else {
+            url = 't/' + url;
+        }
+        img.src = url;
+    }
+
+    // Moving the map, loading more tiles as necessary
+    this.update = function(dx, dy, noMove) {
+        drag_x += dx;
+        drag_y += dy;
+        //log.log(drag_x + ' ' + drag_y);
+        this.point.x = x + 1 - drag_x/this.tilewidth;
+        this.point.y = y + 1 - drag_y/this.tileheight;
+        //log.log(this.point);
+        if (!noMove) {
+            this.drag.style.left = drag_x + 'px';
+            this.drag.style.top = drag_y + 'px';
+        }
+
+        for (var i=0; i<6; i++) {
+            for (var j=0; j<6; j++) {
+                var id = i+'.'+j;
+                var xx = x+i-2;
+                var yy = y+j-2;
+                var img = document.getElementById(id);
+                if (img) {
+                    if (!img.xx) { img.xx = xx; }
+                    if (!img.yy) { img.yy = yy; }
+                    if (!img.galleryimg) { img.galleryimg = false; }
+                    if (drag_x + img.offsetLeft > 750) {
+                        image_rotate(img, -6, 0);
+                    } else if (drag_x + img.offsetLeft < -500) {
+                        image_rotate(img, 6, 0);
+                    } else if (drag_y + img.offsetTop > 750) {
+                        image_rotate(img, 0, -6);
+                    } else if (drag_y + img.offsetTop < -500) {
+                        image_rotate(img, 0, 6);
+                    }
+                    continue;
+                }
+                img = document.createElement('img');
+                img.id = id;
+                img.style.position = 'absolute';
+                img.style.width = this.tilewidth + 'px';
+                img.style.height = this.tileheight + 'px';
+                img.style.left = ((i-2)*self.tilewidth) + 'px';
+                img.style.top = ((j-2)*self.tileheight) + 'px';
+                img.galleryimg = false;
+                img.xx = xx;
+                img.yy = yy;
+                image_rotate(img, 0, 0);
+                img.alt = 'Loading...';
+                this.drag.appendChild(img);
+            }
+        }
+        return false;
+    };
+    this.update(0,0);
+
+    this.zoom_change = function(factor) {
+        self.point.x *= factor;
+        self.point.y *= factor;
+        //log.log(self.point)
+        var rx = Math.floor(self.point.x);
+        var ry = Math.floor(self.point.y);
+        var dx = rx - self.point.x;
+        var dy = ry - self.point.y;
+        x = rx - 1;
+        y = ry - 1;
+        drag_x = dx*self.tilewidth;
+        drag_y = dy*self.tileheight;
+        this.drag.style.left = drag_x + 'px';
+        this.drag.style.top = drag_y + 'px';
+        for (var i=0; i<6; i++) {
+            for (var j=0; j<6; j++) {
+                var id = i+'.'+j
+                var xx = x+i-2;
+                var yy = y+j-2;
+                var img = document.getElementById(id);
+                if (img) {
+                    img.style.left = ((i-2)*self.tilewidth) + 'px';
+                    img.style.top = ((j-2)*self.tileheight) + 'px';
+                    img.xx = xx;
+                    img.yy = yy;
+                    image_rotate(img, 0, 0);
+                }
+            }
+        }
+    }
+
+    this.add_pin = function(e, point) {
+        if (this.in_drag) { this.in_drag = false; return false; }
+        //log.log('click')
+        //log.log(point)
+        if (!point) point = new Point();
+        m = new Pin(point.x-this.pos[0]-drag_x, point.y-this.pos[1]-drag_y);
+        this.drag.appendChild(m.pin);
+        return false;
+    }
+}
+
+Map.prototype = {
+    myAnim : null,
+    in_drag : false,
+
+    setCursor : function(s) {
+        this.map.style.cursor = s;
+    },
+
+    centre : function(e, point){
+        //log.log('dblclick')
+        var x = -point.x + this.width/2 + this.pos[0];
+        var y = -point.y + this.height/2 + this.pos[1];
+        this.pan(x,y);
+    },
+
+    pan : function(x,y) {
+        if (!this.myAnim || !this.myAnim.isAnimated()) {
+            this.update(x,y, true);
+            this.myAnim = new YAHOO.util.Motion('drag', {points: { by:[x,y] } }, 0.5, YAHOO.util.Easing.easeBoth);
+            this.myAnim.animate();
+        }
+    },
+    drag_move : function(e, point){
+        this.in_drag = true;
+        this.last_mouse_pos = this.mouse_pos;
+        this.mouse_pos = point;
+        this.update(this.mouse_pos.x-this.last_mouse_pos.x, this.mouse_pos.y-this.last_mouse_pos.y);
+        return false;
+    },
+    drag_start : function(e, point){
+        //log.log('mousedown')
+        this.mouse_pos = point;
+        this.setCursor('move');
+        document.onmousemove = associateObjWithEvent(this, 'drag_move');
+        document.onmouseup = associateObjWithEvent(this, 'drag_end');
+        return false;
+    },
+    drag_end : function(e){
+        //log.log('mouseup')
+        document.onmousemove = null;
+        document.onmouseup = null;
+        this.setCursor('auto');
+//        this.in_drag = false;
+        return false;
+    },
+    drag_end_out : function(e){
+        var relTarg;
+        if (e.relatedTarget) { relTarg = e.relatedTarget; }
+        else if (e.toElement) { relTarg = e.toElement; }
+        if (!relTarg) {
+            // mouse out to unknown = left the window?
+            document.onmousemove = null;
+            document.onmouseup = null;
+            this.setCursor('auto');
+        }
+        return false;
+    }
+
+};
+
+function get_posn(e) {
+    var posx, posy;
+    if (e.pageX || e.pageY) {
+        posx = e.pageX;
+        posy = e.pageY;
+    } else if (e.clientX || e.clientY) {
+        posx = e.clientX;
+        if (document.documentElement && document.documentElement.scrollLeft) {
+            posx += document.documentElement.scrollLeft;
+        } else {
+            posx += document.body.scrollLeft;
+        }
+        posy = e.clientY;
+        if (document.documentElement && document.documentElement.scrollTop) {
+            posy += document.documentElement.scrollTop;
+        } else {
+            posy += document.body.scrollTop;
+        }
+    }
+    return new Point(posx, posy);
+}
+
+function associateObjWithEvent(obj, methodName) {
+    return (function(e) {
+        e = e || window.event;
+        var point = get_posn(e);
+        return obj[methodName](e, point);
+    });
+}
+
+function Log(el) {
+    var logging = true;
+    var logdiv = document.getElementById(el);
+    this.log = function(s) {
+        if (logging) {
+            logdiv.innerHTML += s + '<br>';
+        }
+    };
+}
+
+function Point(x,y) {
+    this.x = x || 0;
+    this.y = y || 0;
+}
+Point.prototype.toString = function(){
+    return "("+this.x+", "+this.y+")";
+};
+
+function Pin(x,y) {
+    this.x = x || 0;
+    this.y = y || 0;
+    this.x -= 6;
+    this.y -= 20;
+    pin = document.createElement('div');
+    pin.style.position = 'absolute';
+    pin.style.top = this.y + 'px';
+    pin.style.left = this.x + 'px';
+    shadow = document.createElement('img');
+    shadow.style.top = '0px';
+    shadow.style.left = '0px';
+    shadow.src = 'i/pin_shadow.png';
+    pin.appendChild(shadow);
+    img = document.createElement('img');
+    img.style.top = '0px';
+    img.style.left = '0px';
+    img.src = 'i/pin_yellow.png';
+    pin.appendChild(img);
+    this.pin = pin;
+}
+Pin.prototype.toString = function() {
+    return "("+this.x+", "+this.y+")";
+}
author	matthew <matthew>	2006-09-19 15:08:36 +0000
committer	matthew <matthew>	2006-09-19 15:08:36 +0000
commit	998534c14693435a79181acbbedd70a2ea7ec08d (patch)
tree	395b48ebeddad620e55d918a17d7a9369ea52aa1 /web
parent	adf632f9b1476f4d8bdffe8cfb85d5e88685ff48 (diff)