/* =================================================================================================
 * TransMenu 
 * March, 2003
 * Customizable multi-level animated DHTML menus with transparency.
 * =================================================================================================
 * "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.
 * =================================================================================================
 * "It's kinda hard to read, though"
 *
 * The uncompressed, commented version of this script can be found at: 
 * http://youngpup.net/projects/transMenus
 * ============================================================================================== */
TransMenu.spacerGif="/media/x.gif";
TransMenu.dingbatOn="/media/submenu-on.gif";
TransMenu.dingbatOff="/media/submenu-off.gif";
TransMenu.dingbatSize=14;
TransMenu.menuPadding=5;
TransMenu.itemPadding=3;
TransMenu.shadowSize=2;
TransMenu.shadowOffset=3;
TransMenu.shadowColor="#888";
TransMenu.shadowPng="/media/grey-40.png";
TransMenu.backgroundColor="#CCCCCC";
TransMenu.backgroundPng="/media/white-90.png";
TransMenu.hideDelay=500;
TransMenu.slideTime=200;
TransMenu.reference={topLeft:1,topRight:2,bottomLeft:3,bottomRight:4};
TransMenu.direction={down:1,right:2};
TransMenu.registry=[];
TransMenu._maxZ=100;

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;
	else if(an=="Microsoft Internet Explorer"){
		if(document.getElementById){
			if(pf.indexOf("mac")==0){
				r=/msie (\d(.\d*)?)/.test(ua)&&Number(RegExp.$1)>=5.1;
			}
			else r=true;
		}
	}
	return r;
}

TransMenu.initialize=function(){
	for(var i=0,menu=null;menu=this.registry[i];i++){
		menu.initialize();
	}
}

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

function TransMenu(oActuator,iDirection,iLeft,iTop,iReferencePoint,parentMenuSet){
	this.addItem=addItem;
	this.addMenu=addMenu;
	this.toString=toString;
	this.initialize=initialize;
	this.isOpen=false;
	this.show=show;
	this.hide=hide;
	this.items=[];
	this.onactivate=new Function();
	this.ondeactivate=new Function();
	this.onmouseover=new Function();
	this.onqueue=new Function();
	this.ondequeue=new Function();
	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;
	
	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,-5,2,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(){
		if(ready){
			_this.isOpen=true;
			animating=true;
			setContainerPos();
			elmCache["clip"].style.visibility="visible";
			elmCache["clip"].style.zIndex=TransMenu._maxZ++;slideStart();
			_this.onactivate();
		}
	}
	
	function hide(){
		if(ready){
			_this.isOpen=false;
			animating=true;
			for(var i=0,item=null;item=elmCache.item[i];i++)
				dehighlight(item);
			if(childMenuSet)
				childMenuSet.hide();
			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);
		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["content"].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["content"].style[pos]=x+"px";
	}
	
	function slideEnd(){
		if(!_this.isOpen)elmCache["clip"].style.visibility="hidden";animating=false;
	}
	
	function initSize(){
		var ow=elmCache["items"].offsetWidth;
		var oh=elmCache["items"].offsetHeight;
		var ua=navigator.userAgent.toLowerCase();
		elmCache["clip"].style.width=ow+TransMenu.shadowSize+2+"px";
		elmCache["clip"].style.height=oh+TransMenu.shadowSize+2+"px";
		elmCache["content"].style.width=ow+TransMenu.shadowSize+"px";
		elmCache["content"].style.height=oh+TransMenu.shadowSize+"px";
		contentHeight=oh+TransMenu.shadowSize;
		contentWidth=ow+TransMenu.shadowSize;
		dim=iDirection==TransMenu.direction.down?contentHeight:contentWidth;
		elmCache["content"].style[pos]=-dim-TransMenu.shadowSize+"px";
		elmCache["clip"].style.visibility="hidden";
		if(ua.indexOf("mac")==-1||ua.indexOf("gecko")>-1){
				elmCache["background"].style.width=ow+"px";
				elmCache["background"].style.height=oh+"px";
				elmCache["background"].style.backgroundColor=TransMenu.backgroundColor;
				elmCache["shadowRight"].style.left=ow+"px";
				elmCache["shadowRight"].style.height=oh-(TransMenu.shadowOffset-TransMenu.shadowSize)+"px";
				elmCache["shadowRight"].style.backgroundColor=TransMenu.shadowColor;
				elmCache["shadowBottom"].style.top=oh+"px";
				elmCache["shadowBottom"].style.width=ow-TransMenu.shadowOffset+"px";
				elmCache["shadowBottom"].style.backgroundColor=TransMenu.shadowColor;
		}
		else{
				elmCache["background"].firstChild.src=TransMenu.backgroundPng;
				elmCache["background"].firstChild.width=ow;
				elmCache["background"].firstChild.height=oh;
				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);
				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("*");
		elmCache={};
		elmCache["clip"]=menu;
		elmCache["item"]=[];
		for(var i=0,elm=null;elm=all[i];i++){
			switch(elm.className){
				case"items":
				case"content":
				case"background":
				case"shadowRight":
				case"shadowBottom":elmCache[elm.className]=elm;break;
				case"item":elm._index=elmCache["item"].length;elmCache["item"][elm._index]=elm;break;
			}
		}
		_this.elmCache=elmCache;
	}

	function initEvents(){
		for(var i=0,item=null;item=elmCache.item[i];i++){
			item.onmouseover=item_mouseover;
			item.onmouseout=item_mouseout;
			item.onclick=item_click;
		}
		if(typeof oActuator.tagName!="undefined"){
			oActuator.onmouseover=actuator_mouseover;
			oActuator.onmouseout=actuator_mouseout;
		}
		elmCache["content"].onmouseover=content_mouseover;
		elmCache["content"].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 
				dehighlight(this);
		}
	}
	
	function item_click(){
		if(!animating){
			if(_this.items[this._index].url)
				location.href=_this.items[this._index].url;
		}
	}
	
	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="content"><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.registry=[];

function TransMenuSet(iDirection,iLeft,iTop,iReferencePoint){
	this.addMenu=addMenu;
	this.showMenu=showMenu;
	this.hideMenu=hideMenu;
	this.hide=hide;
	this.hideCurrent=hideCurrent;
	var menus=[];
	var _this=this;
	var current=null;
	this.index=TransMenuSet.registry.length;
	TransMenuSet.registry[this.index]=this;
	
	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){
			if(current!=null)hide(current);
			current=oMenu;
			oMenu.show();
		}
		else{
			cancelHide(oMenu);
		}
	}
	
	function hideMenu(oMenu){
		if(current==oMenu&&oMenu.isOpen){
			if(!oMenu.hideTimer)scheduleHide(oMenu);
		}
	}
	
	function scheduleHide(oMenu){
		oMenu.onqueue();
		oMenu.hideTimer=window.setTimeout("TransMenuSet.registry["+_this.index+"].hide(TransMenu.registry["+oMenu.index+"])",TransMenu.hideDelay);
	}
	
	function cancelHide(oMenu){
		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;
		}
	}
}

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

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();
}

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);
}

Accelimation.prototype.stop=function(){
	Accelimation._remove(this);
}

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();
}

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

Accelimation._add=function(o){
	var index=this.instances.length;
	this.instances[index]=o;
	if(this.instances.length==1){
		this.timerID=window.setInterval("Accelimation._paintAll()",this.targetRes);
	}
}

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(this.instances.length==0){
		window.clearInterval(this.timerID);
		this.timerID=null;
	}
}

Accelimation._paintAll=function(){
	var now=new Date().getTime();
	for(var i=0;i<this.instances.length;i++){
		this.instances[i]._paint(now);
	}
}

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)
}

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);
}

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