/* =================================================================================================
* TransMenu 
* March, 2003
*
* Customizable multi-level animated DHTML menus with transparency.
*
* Copyright 2003-2004, Aaron Boodman (www.youngpup.net)
* =================================================================================================
* "Can I use this?"
* 
* Use of this library is governed by the Creative Commons Attribution 2.0 License. You can check it 
* out at: http://creativecommons.org/licenses/by/2.0/
*
* Basically: You may copy, distribute, and eat this code as you wish. But you must give me credit 
* for writing it. You may not misrepresent yourself as the author of this code.
* =================================================================================================
* updates:
* 04.19.04 fixed cascade problem with menus nested greater than two levels.
* 12.23.03 added hideCurrent for menu actuators with no menus. renamed to TransMenu.
* 04.18.03  fixed render bug in IE 5.0 Mac by removing that browser from compatibility table ;)
*      also made gecko check a little more strict by specifying build no.
* ============================================================================================== */

//==================================================================================================
// Configuration properties
//==================================================================================================
TransMenu.spacerGif = "images/x.gif";                     // path to a transparent spacer gif
TransMenu.dingbatOn = "images/submenu-on.gif";            // path to the active sub menu dingbat
TransMenu.dingbatOff = "images/submenu-off.gif";          // path to the inactive sub menu dingbat
TransMenu.dingbatSize = 14;                            // size of the dingbat (square shape assumed)
TransMenu.menuPadding = 5;                             // padding between menu border and items grid
TransMenu.itemPadding = 3;                             // additional padding around each item
TransMenu.shadowSize = 2;                              // size of shadow under menu
TransMenu.shadowOffset = 3;                            // distance shadow should be offset from leading edge
TransMenu.shadowColor = "#888";                        // color of shadow (transparency is set in CSS)
TransMenu.shadowPng = "images/grey-40.png";               // a PNG graphic to serve as the shadow for mac IE5
TransMenu.backgroundColor = "#546078";                   // color of the background (transparency set in CSS)
TransMenu.backgroundPng = "images/white-90.png";          // a PNG graphic to server as the background for mac IE5
TransMenu.hideDelay = 400;                            // number of milliseconds to wait before hiding a menu
TransMenu.slideTime = 400;                             // number of milliseconds it takes to open and close a menu


//==================================================================================================
// Internal use properties
//==================================================================================================
TransMenu.reference = {topLeft:1,topRight:2,bottomLeft:3,bottomRight:4};
TransMenu.direction = {down:1,right:2};
TransMenu.registry = [];
TransMenu._maxZ = 100;



//==================================================================================================
// Static methods
//==================================================================================================
// supporting win ie5+, mac ie5.1+ and gecko >= mozilla 1.0
TransMenu.isSupported = function() {
	var ua = navigator.userAgent.toLowerCase();
    var pf = navigator.platform.toLowerCase();
	var an = navigator.appName;
	var r = false;

	if (ua.indexOf("gecko") > -1 && navigator.productSub >= 20020605) r = true; // gecko >= moz 1.0
	else if (an == "Microsoft Internet Explorer") {
			if (document.getElementById) { // ie5.1+ mac,win
					if (pf.indexOf("mac") == 0) {
		  r = /msie (\d(.\d*)?)/.test(ua) && Number(RegExp.$1) >= 5.1;
		}
		else r = true;
			}
	}

	return r;
}

// call this in onload once menus have been created
TransMenu.initialize = function() {
	for (var i = 0, menu = null; menu = this.registry[i]; i++) {
			menu.initialize();
	}
}

// call this in document body to write out menu html
TransMenu.renderAll = function() {
	var aMenuHtml = [];
	for (var i = 0, menu = null; menu = this.registry[i]; i++) {
			aMenuHtml[i] = menu.toString();
	}
	document.write(aMenuHtml.join(""));
}

//==================================================================================================
// TransMenu constructor (only called internally)
//==================================================================================================
// oActuator            : The thing that causes the menu to be shown when it is mousedover. Either a
//                        reference to an HTML element, or a TransMenuItem from an existing menu.
// iDirection           : The direction to slide out. One of TransMenu.direction.
// iLeft                : Left pixel offset of menu from actuator
// iTop                 : Top pixel offset of menu from actuator
// iReferencePoint      : Corner of actuator to measure from. One of TransMenu.referencePoint.
// parentMenuSet        : Menuset this menu will be added to.
//==================================================================================================
function TransMenu(oActuator, iDirection, iLeft, iTop, iReferencePoint, parentMenuSet) {
	// public methods
	this.addItem = addItem;
	this.addMenu = addMenu;
	this.toString = toString;
	this.initialize = initialize;
	this.isOpen = false;
	this.show = show;
	this.hide = hide;
	this.items = [];

	// events
	this.onactivate = new Function();       // when the menu starts to slide open
	this.ondeactivate = new Function();     // when the menu finishes sliding closed
	this.onmouseover = new Function();      // when the menu has been moused over
	this.onqueue = new Function();          // hack .. when the menu sets a timer to be closed a little while in the future
this.ondequeue = new Function();

	// initialization
	this.index = TransMenu.registry.length;
	TransMenu.registry[this.index] = this;

	var id = "TransMenu" + this.index;
	var contentHeight = null;
	var contentWidth = null;
	var childMenuSet = null;
	var animating = false;
	var childMenus = [];
	var slideAccel = -1;
	var elmCache = null;
	var ready = false;
	var _this = this;
	var a = null;

	var pos = iDirection == TransMenu.direction.down ? "top" : "left";
	var dim = null;

	// private and public method implimentations
	function addItem(sText, sUrl) {
			var item = new TransMenuItem(sText, sUrl, this);
			item._index = this.items.length;
			this.items[item._index] = item;
	}

	function addMenu(oMenuItem) {
			if (!oMenuItem.parentMenu == this) throw new Error("Cannot add a menu here");

			if (childMenuSet == null) childMenuSet = new TransMenuSet(TransMenu.direction.right, 0, 0, TransMenu.reference.topRight);

			var m = childMenuSet.addMenu(oMenuItem);

			childMenus[oMenuItem._index] = m;
			m.onmouseover = child_mouseover;
			m.ondeactivate = child_deactivate;
			m.onqueue = child_queue;
	m.ondequeue = child_dequeue;

			return m;
	}

	function initialize() {
			initCache();
			initEvents();
			initSize();
			ready = true;
	}

	function show() {
			//dbg_dump("show");
			if (ready) {
					_this.isOpen = true;
					animating = true;

					obj = elmCache["clip"];
					obj.style.position='absolute';
					obj.style.visibility='hidden';
					obj.style.display='block';
					obj.style.visibility='';

					setContainerPos();
					
					//obj.style.display='none';
					elmCache["clip"].style.visibility = "visible";
					elmCache["clip"].style.zIndex = TransMenu._maxZ--;

//					if(navigator.appName=="Netscape")
//					{
//						elmCache["clip"].style.MozOpacity:.0;
//					}

					//dbg_dump("maxZ: " + TransMenu._maxZ);

					slideStart();
					_this.onactivate();
//					if(navigator.appName=="Netscape")
//					{
//						elmCache["clip"].style.MozOpacity:.8;
//					}

			}
	}

	function hide() {
			if (ready) {
					_this.isOpen = false;
					
					TransMenu._maxZ++;
					
					for (var i = 0, item = null; item = elmCache.item[i]; i++) 
							dehighlight(item);

					if (childMenuSet) childMenuSet.hide();
	
					if(navigator.appName=="Netscape")
					{
						elmCache["clip"].style.display = "None";
					}
					slideStart();
					_this.ondeactivate();
			}
	}

	function setContainerPos() {
			var sub = oActuator.constructor == TransMenuItem; 
			var act = sub ? oActuator.parentMenu.elmCache["item"][oActuator._index] : oActuator; 
			var el = act;
			
			var x = 0;
			var y = 0;
			
			var minX = 0;
			var maxX = (window.innerWidth ? window.innerWidth : document.body.clientWidth) - parseInt(elmCache["clip"].style.width);
			var minY = 0;
			var maxY = (window.innerHeight ? window.innerHeight : document.body.clientHeight) - parseInt(elmCache["clip"].style.height);

			// add up all offsets... subtract any scroll offset
			while (sub ? el.parentNode.className.indexOf("transMenu") == -1 : el.offsetParent) {
					x += el.offsetLeft;
					y += el.offsetTop;

					if (el.scrollLeft) x -= el.scrollLeft;
					if (el.scrollTop) y -= el.scrollTop;
					
					el = el.offsetParent;
			}

			if (oActuator.constructor == TransMenuItem) {
					x += parseInt(el.parentNode.style.left);
					y += parseInt(el.parentNode.style.top);
			}

			switch (iReferencePoint) {
					case TransMenu.reference.topLeft:
							break;
					case TransMenu.reference.topRight:
							x += act.offsetWidth;
							break;
					case TransMenu.reference.bottomLeft:
							y += act.offsetHeight;
							break;
					case TransMenu.reference.bottomRight:
							x += act.offsetWidth;
							y += act.offsetHeight;
							break;
			}

			x += iLeft;
			y += iTop;

			x = Math.max(Math.min(x, maxX), minX);
			y = Math.max(Math.min(y, maxY), minY);

			elmCache["clip"].style.left = x + "px";
			elmCache["clip"].style.top = y + "px";
	}

	function slideStart() {
			var x0 = parseInt(elmCache["menucontent"].style[pos]);
			var x1 = _this.isOpen ? 0 : -dim;
			
			if (a != null) a.stop();
			a = new Accelimation(x0, x1, TransMenu.slideTime, slideAccel);

			a.onframe = slideFrame;
			a.onend = slideEnd;

			a.start();
	}

	function slideFrame(x) {
			elmCache["menucontent"].style[pos] = x + "px";
	}

	function slideEnd() {
			if (!_this.isOpen) elmCache["clip"].style.visibility = "hidden";
			animating = false;
	}

	function initSize() {
			// everything is based off the size of the items table...
			var ow = elmCache["items"].offsetWidth;
			var oh = elmCache["items"].offsetHeight;
			var ua = navigator.userAgent.toLowerCase();

			// clipping container should be ow/oh + the size of the shadow
			elmCache["clip"].style.width = ow + TransMenu.shadowSize +  2 + "px";
			elmCache["clip"].style.height = oh + TransMenu.shadowSize + 2 + "px";

			// same with content...
			elmCache["menucontent"].style.width = ow + TransMenu.shadowSize + "px";
			elmCache["menucontent"].style.height = oh + TransMenu.shadowSize + "px";

			contentHeight = oh + TransMenu.shadowSize;
			contentWidth = ow + TransMenu.shadowSize;
			
			dim = iDirection == TransMenu.direction.down ? contentHeight : contentWidth;

			// set initially closed
			elmCache["menucontent"].style[pos] = -dim - TransMenu.shadowSize + "px";
			elmCache["clip"].style.visibility = "hidden";

			// if *not* mac/ie 5
			if (ua.indexOf("mac") == -1 || ua.indexOf("gecko") > -1) {
					// set background div to offset size
					elmCache["background"].style.width = ow + "px";
					elmCache["background"].style.height = oh + "px";
					elmCache["background"].style.backgroundColor = TransMenu.backgroundColor;

					// shadow left starts at offset left and is offsetHeight pixels high
					elmCache["shadowRight"].style.left = ow + "px";
					elmCache["shadowRight"].style.height = oh - (TransMenu.shadowOffset - TransMenu.shadowSize) + "px";
					elmCache["shadowRight"].style.backgroundColor = TransMenu.shadowColor;

					// shadow bottom starts at offset height and is offsetWidth - shadowOffset 
					// pixels wide (we don't want the bottom and right shadows to overlap or we 
					// get an extra bright bottom-right corner)
					elmCache["shadowBottom"].style.top = oh + "px";
					//elmCache["shadowBottom"].style.width = ow - TransMenu.shadowOffset + "px";
					elmCache["shadowBottom"].style.backgroundColor = TransMenu.shadowColor;
			}
			// mac ie is a little different because we use a PNG for the transparency
			else {
					// set background div to offset size
					elmCache["background"].firstChild.src = TransMenu.backgroundPng;
					elmCache["background"].firstChild.width = ow;
					elmCache["background"].firstChild.height = oh;

					// shadow left starts at offset left and is offsetHeight pixels high
					elmCache["shadowRight"].firstChild.src = TransMenu.shadowPng;
					elmCache["shadowRight"].style.left = ow + "px";
					elmCache["shadowRight"].firstChild.width = TransMenu.shadowSize;
					elmCache["shadowRight"].firstChild.height = oh - (TransMenu.shadowOffset - TransMenu.shadowSize);

					// shadow bottom starts at offset height and is offsetWidth - shadowOffset 
					// pixels wide (we don't want the bottom and right shadows to overlap or we 
					// get an extra bright bottom-right corner)
					elmCache["shadowBottom"].firstChild.src = TransMenu.shadowPng;
					elmCache["shadowBottom"].style.top = oh + "px";
					elmCache["shadowBottom"].firstChild.height = TransMenu.shadowSize;
					elmCache["shadowBottom"].firstChild.width = ow - TransMenu.shadowOffset;
			}
	}
	
	function initCache() {
			var menu = document.getElementById(id);
			var all = menu.all ? menu.all : menu.getElementsByTagName("*"); // IE/win doesn't support * syntax, but does have the document.all thing

			elmCache = {};
			elmCache["clip"] = menu;
			elmCache["item"] = [];
			
			for (var i = 0, elm = null; elm = all[i]; i++) {
					switch (elm.className) {
							case "items":
							case "menucontent":
							case "background":
							case "shadowRight":
							case "shadowBottom":
									elmCache[elm.className] = elm;
									break;
							case "item":
									elm._index = elmCache["item"].length;
									elmCache["item"][elm._index] = elm;
									break;
					}
			}

			// hack!
			_this.elmCache = elmCache;
	}

	function initEvents() {
			// hook item mouseover
			for (var i = 0, item = null; item = elmCache.item[i]; i++) {
					item.onmouseover = item_mouseover;
					item.onmouseout = item_mouseout;
					item.onclick = item_click;
			}

			// hook actuation
			if (typeof oActuator.tagName != "undefined") {
					oActuator.onmouseover = actuator_mouseover;
					oActuator.onmouseout = actuator_mouseout;
			}

			// hook menu mouseover
			elmCache["menucontent"].onmouseover = content_mouseover;
			elmCache["menucontent"].onmouseout = content_mouseout;
	}

	function highlight(oRow) {
			oRow.className = "item hover";
			if (childMenus[oRow._index]) 
					oRow.lastChild.firstChild.src = TransMenu.dingbatOn;
	}

	function dehighlight(oRow) {
			oRow.className = "item";
			if (childMenus[oRow._index]) 
					oRow.lastChild.firstChild.src = TransMenu.dingbatOff;
	}

	function item_mouseover() {
			if (!animating) {
					highlight(this);

					if (childMenus[this._index]) 
							childMenuSet.showMenu(childMenus[this._index]);
					else if (childMenuSet) childMenuSet.hide();
			}
	}

	function item_mouseout() {
			if (!animating) {
					if (childMenus[this._index])
							childMenuSet.hideMenu(childMenus[this._index]);
					else    // otherwise child_deactivate will do this
							dehighlight(this);
			}
	}

	function item_click() {
			hide();
			if (!animating) {
					if (_this.items[this._index].url) 
					{
							myItem = _this.items[this._index].url;
							if(myItem.substring(0,3)=="-#-")
							{
								loadContent(myItem);	
							}
							else
							{
								if(_this.items[this._index].url.substring(0, 1)=="/")
								{
									//location.href = "." + _this.items[this._index].url;
									
									popupWin = window.open("." + _this.items[this._index].url,
									  'open_window',
									  'menubar, toolbar, location, directories, status, scrollbars, resizable, dependent, width=640, height=480, left=0, top=0')
								}
								else
								{
									//location.href = _this.items[this._index].url;
									
									popupWin = window.open(_this.items[this._index].url,
									  'open_window',
									  'menubar, toolbar, location, directories, status, scrollbars, resizable, dependent, width=640, height=480, left=0, top=0')
								}
							}
					}
			}
	}

	function actuator_mouseover() {
			parentMenuSet.showMenu(_this);
	}

	function actuator_mouseout() {
			parentMenuSet.hideMenu(_this);
	}

	function content_mouseover() {
			if (!animating) {
					parentMenuSet.showMenu(_this);
					_this.onmouseover();
			}
	}

	function content_mouseout() {
			if (!animating) {
					parentMenuSet.hideMenu(_this);
			}
	}

	function child_mouseover() {
			if (!animating) {
					parentMenuSet.showMenu(_this);
			}
	}

	function child_deactivate() {
			for (var i = 0; i < childMenus.length; i++) {
					if (childMenus[i] == this) {
							dehighlight(elmCache["item"][i]);
							break;
					}
			}
	}

	function child_queue() {
			parentMenuSet.hideMenu(_this);
	}

function child_dequeue() {
	parentMenuSet.showMenu(_this);
}

	function toString() {
			var aHtml = [];
			var sClassName = "transMenu" + (oActuator.constructor != TransMenuItem ? " top" : "");

			for (var i = 0, item = null; item = this.items[i]; i++) {
					aHtml[i] = item.toString(childMenus[i]);
			}

			return '<div id="' + id + '" class="' + sClassName + '">' + 
					'<div class="menucontent"><table class="items" cellpadding="0" cellspacing="0" border="0">' + 
					'<tr><td colspan="2"><img src="' + TransMenu.spacerGif + '" width="1" height="' + TransMenu.menuPadding + '"></td></tr>' + 
					aHtml.join('') + 
					'<tr><td colspan="2"><img src="' + TransMenu.spacerGif + '" width="1" height="' + TransMenu.menuPadding + '"></td></tr></table>' + 
					'<div class="shadowBottom"><img src="' + TransMenu.spacerGif + '" width="1" height="1"></div>' + 
					'<div class="shadowRight"><img src="' + TransMenu.spacerGif + '" width="1" height="1"></div>' + 
		'<div class="background"><img src="' + TransMenu.spacerGif + '" width="1" height="1"></div>' + 
			  '</div></div>';
	}
}


//==================================================================================================
// TransMenuSet
//==================================================================================================
// iDirection           : The direction to slide out. One of TransMenu.direction.
// iLeft                : Left pixel offset of menus from actuator
// iTop                 : Top pixel offset of menus from actuator
// iReferencePoint      : Corner of actuator to measure from. One of TransMenu.referencePoint.
//==================================================================================================
TransMenuSet.registry = [];

function TransMenuSet(iDirection, iLeft, iTop, iReferencePoint) {
	// public methods
	this.addMenu = addMenu;
	this.showMenu = showMenu;
	this.hideMenu = hideMenu;
	this.hide = hide;
	this.hideCurrent = hideCurrent;

	// initialization
	var menus = [];
	var _this = this;
	var current = null;

	this.index = TransMenuSet.registry.length;
	TransMenuSet.registry[this.index] = this;

	// method implimentations...
	function addMenu(oActuator) {
			var m = new TransMenu(oActuator, iDirection, iLeft, iTop, iReferencePoint, this);
			menus[menus.length] = m;
			return m;
	}

	function showMenu(oMenu) {
			if (oMenu != current) {
					// close currently open menu
					if (current != null) hide(current);        

					// set current menu to this one
					current = oMenu;

					// if this menu is closed, open it
					oMenu.show();
			}
			else {
					// hide pending calls to close this menu
					cancelHide(oMenu);
			}
	}

	function hideMenu(oMenu) {
			//dbg_dump("hideMenu a " + oMenu.index);
			if (current == oMenu && oMenu.isOpen) {
					//dbg_dump("hideMenu b " + oMenu.index);
					if (!oMenu.hideTimer) scheduleHide(oMenu);
			}
	}

	function scheduleHide(oMenu) {
			//dbg_dump("scheduleHide " + oMenu.index);
			oMenu.onqueue();
			oMenu.hideTimer = window.setTimeout("TransMenuSet.registry[" + _this.index + "].hide(TransMenu.registry[" + oMenu.index + "])", TransMenu.hideDelay);
	}

	function cancelHide(oMenu) {
			//dbg_dump("cancelHide " + oMenu.index);
			if (oMenu.hideTimer) {
		oMenu.ondequeue();
					window.clearTimeout(oMenu.hideTimer);
					oMenu.hideTimer = null;
			}
	}

	function hide(oMenu) {   
			if (!oMenu && current) oMenu = current;

			if (oMenu && current == oMenu && oMenu.isOpen) {
					hideCurrent();
			}
	}

	function hideCurrent() {
	if (null != current) {
	  cancelHide(current);
	  current.hideTimer = null;
	  current.hide();
	  current = null;
	}
	}
}

//==================================================================================================
// TransMenuItem (internal)
// represents an item in a dropdown
//==================================================================================================
// sText        : The item display text
// sUrl         : URL to load when the item is clicked
// oParent      : Menu this item is a part of
//==================================================================================================
function TransMenuItem(sText, sUrl, oParent) {
	this.toString = toString;
	this.text = sText;
	this.url = sUrl;
	this.parentMenu = oParent;

	function toString(bDingbat) {
			var sDingbat = bDingbat ? TransMenu.dingbatOff : TransMenu.spacerGif;
			var iEdgePadding = TransMenu.itemPadding + TransMenu.menuPadding;
			var sPaddingLeft = "padding:" + TransMenu.itemPadding + "px; padding-left:" + iEdgePadding + "px;"
			var sPaddingRight = "padding:" + TransMenu.itemPadding + "px; padding-right:" + iEdgePadding + "px;"

			return '<tr class="item"><td class="subMenuItem" nowrap style="' + sPaddingLeft + '">' + 
					sText + '</td><td width="14" style="' + sPaddingRight + '">' + 
					'<img src="' + sDingbat + '" width="14" height="14"></td></tr>';
	}
}






//=====================================================================
// Accel[erated] [an]imation object
// change a property of an object over time in an accelerated fashion
//=====================================================================
// obj  : reference to the object whose property you'd like to animate
// prop : property you would like to change eg: "left"
// to   : final value of prop
// time : time the animation should take to run
// zip  : optional. specify the zippiness of the acceleration. pick a 
//      number between -1 and 1 where -1 is full decelerated, 1 is 
//      full accelerated, and 0 is linear (no acceleration). default
//      is 0.
// unit  : optional. specify the units for use with prop. default is 
//      "px".
//=====================================================================
// bezier functions lifted from the lib_animation.js file in the 
// 13th Parallel API. www.13thparallel.org
//=====================================================================

function Accelimation(from, to, time, zip) {
if (typeof zip  == "undefined") zip  = 0;
if (typeof unit == "undefined") unit = "px";

	this.x0         = from;
	this.x1    = to;
this.dt    = time;
this.zip  = -zip;
this.unit  = unit;
this.timer  = null;
this.onend  = new Function();
	this.onframe    = new Function();
}



//=====================================================================
// public methods
//=====================================================================

// after you create an accelimation, you call this to start it-a runnin'
Accelimation.prototype.start = function() {
this.t0 = new Date().getTime();
this.t1 = this.t0 + this.dt;
var dx  = this.x1 - this.x0;
this.c1 = this.x0 + ((1 + this.zip) * dx / 3);
this.c2 = this.x0 + ((2 + this.zip) * dx / 3);
Accelimation._add(this);
}

// and if you need to stop it early for some reason...
Accelimation.prototype.stop = function() {
Accelimation._remove(this);
}



//=====================================================================
// private methods
//=====================================================================

// paints one frame. gets called by Accelimation._paintAll.
Accelimation.prototype._paint = function(time) {
if (time < this.t1) {
var elapsed = time - this.t0;
	  this.onframe(Accelimation._getBezier(elapsed/this.dt,this.x0,this.x1,this.c1,this.c2));
	}
else this._end();
}

// ends the animation
Accelimation.prototype._end = function() {
Accelimation._remove(this);
	this.onframe(this.x1);
this.onend();
}




//=====================================================================
// static methods (all private)
//=====================================================================

// add a function to the list of ones to call periodically
Accelimation._add = function(o) {
var index = this.instances.length;
this.instances[index] = o;
// if this is the first one, start the engine
if (this.instances.length == 1) {
this.timerID = window.setInterval("Accelimation._paintAll()", this.targetRes);
}
}

// remove a function from the list
Accelimation._remove = function(o) {
for (var i = 0; i < this.instances.length; i++) {
if (o == this.instances[i]) {
  this.instances = this.instances.slice(0,i).concat( this.instances.slice(i+1) );
  break;
}
}
// if that was the last one, stop the engine
if (this.instances.length == 0) {
window.clearInterval(this.timerID);
this.timerID = null;
}
}

// "engine" - call each function in the list every so often
Accelimation._paintAll = function() {
var now = new Date().getTime();
for (var i = 0; i < this.instances.length; i++) {
this.instances[i]._paint(now);
}
}


// Bezier functions:
Accelimation._B1 = function(t) { return t*t*t }
Accelimation._B2 = function(t) { return 3*t*t*(1-t) }
Accelimation._B3 = function(t) { return 3*t*(1-t)*(1-t) }
Accelimation._B4 = function(t) { return (1-t)*(1-t)*(1-t) }


//Finds the coordinates of a point at a certain stage through a bezier curve
Accelimation._getBezier = function(percent,startPos,endPos,control1,control2) {
return endPos * this._B1(percent) + control2 * this._B2(percent) + control1 * this._B3(percent) + startPos * this._B4(percent);
}


//=====================================================================
// static properties
//=====================================================================

Accelimation.instances = [];
Accelimation.targetRes = 10;
Accelimation.timerID = null;


//=====================================================================
// IE win memory cleanup
//=====================================================================

if (window.attachEvent) {
var cearElementProps = [
'data',
'onmouseover',
'onmouseout',
'onmousedown',
'onmouseup',
'ondblclick',
'onclick',
'onselectstart',
'oncontextmenu'
];

window.attachEvent("onunload", function() {
	var el;
	for(var d = document.all.length;d--;){
		el = document.all[d];
		for(var c = cearElementProps.length;c--;){
			el[cearElementProps[c]] = null;
		}
	}
});
}