var ddlevelsmenu={
downarrowpointer: ["/menu/arrow-down.gif", 1,1], 
rightarrowpointer: ["/menu/arrow-right.gif", 1,1], 
hideinterval: 200, 
httpsiframesrc: "blank.htm", 
topmenuids: [], 
topitems: {}, 
subuls: {}, 
topitemsindex: -1,
ulindex: -1,
hidetimers: {}, 
shimadded: false,
getoffset:function(what, offsettype){
	return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype]
},
getoffsetof:function(el){
	el._offsets={left:this.getoffset(el, "offsetLeft"), top:this.getoffset(el, "offsetTop")}
},
getwindowsize:function(){
	this.docwidth=window.innerWidth? window.innerWidth-10 : this.standardbody.clientWidth-10
	this.docheight=window.innerHeight? window.innerHeight-15 : this.standardbody.clientHeight-18
},
gettopitemsdimensions:function(){
	for (var m=0; m<this.topmenuids.length; m++){
		var topmenuid=this.topmenuids[m]
		for (var i=0; i<this.topitems[topmenuid].length; i++){
			var header=this.topitems[topmenuid][i]
			var submenu=document.getElementById(header.getAttribute('rel'))
			header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight}
		}	}},
isContained:function(m, e){
	var e=window.event || e
	var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
	while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
	if (c==m)
		return true
	else
		return false
},
addpointer:function(target, imgclass, imginfo){
	var pointer=document.createElement("img")
	pointer.src=imginfo[0]
	pointer.style.width=imginfo[1]+"px"
	pointer.style.height=imginfo[2]+"px"
	pointer.className=imgclass
	target.appendChild(pointer)
},
css:function(el, targetclass, action){
	var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
	if (action=="check")
		return needle.test(el.className)
	else if (action=="remove")
		el.className=el.className.replace(needle, "")
	else if (action=="add" && !needle.test(el.className))
		el.className+=" "+targetclass
},

addshimmy:function(target){
	var shim=(!window.opera)? document.createElement("iframe") : document.createElement("div")
	shim.className="ddiframeshim"
	shim.setAttribute("src", location.protocol=="https:"? this.httpsiframesrc : "about:blank")
	shim.setAttribute("frameborder", "0")
	target.appendChild(shim)
	try{
		shim.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
	}
	catch(e){}
	return shim
},
positionshim:function(header, submenu, dir, scrollX, scrollY){
	if (header._istoplevel){
		var scrollY=window.pageYOffset? window.pageYOffset : this.standardbody.scrollTop
		var topgap=header._offsets.top-scrollY
		var bottomgap=scrollY+this.docheight-header._offsets.top-header._dimensions.h
		if (topgap>0){
			this.shimmy.topshim.style.left=scrollX+"px"
			this.shimmy.topshim.style.top=scrollY+"px"
			this.shimmy.topshim.style.width="99%"
			this.shimmy.topshim.style.height=topgap+"px" 
		}
		if (bottomgap>0){
			this.shimmy.bottomshim.style.left=scrollX+"px"
			this.shimmy.bottomshim.style.top=header._offsets.top + header._dimensions.h +"px"
			this.shimmy.bottomshim.style.width="99%"
			this.shimmy.bottomshim.style.height=bottomgap+"px" 
		}
	}
},

hideshim:function(){
	this.shimmy.topshim.style.width=this.shimmy.bottomshim.style.width=0
	this.shimmy.topshim.style.height=this.shimmy.bottomshim.style.height=0
},
buildmenu:function(mainmenuid, header, submenu, submenupos, istoplevel, dir){
	header._master=mainmenuid 
	header._pos=submenupos 
	header._istoplevel=istoplevel
	if (istoplevel){
		this.addEvent(header, function(e){
		ddlevelsmenu.hidemenu(ddlevelsmenu.subuls[this._master][parseInt(this._pos)])
		}, "click")
	}
	this.subuls[mainmenuid][submenupos]=submenu
	header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight}
	this.getoffsetof(header)
	submenu.style.left=0
	submenu.style.top=0
	submenu.style.visibility="hidden"
	this.addEvent(header, function(e){ 
		if (!ddlevelsmenu.isContained(this, e)){
			if (typeof ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]!="undefined")
				clearTimeout(ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)])
			if (this._istoplevel)
				ddlevelsmenu.css(this, "selected", "add")
			var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
			ddlevelsmenu.getoffsetof(header)
			var scrollX=window.pageXOffset? window.pageXOffset : ddlevelsmenu.standardbody.scrollLeft
			var scrollY=window.pageYOffset? window.pageYOffset : ddlevelsmenu.standardbody.scrollTop
			var submenurightedge=this._offsets.left + this._dimensions.submenuw + (this._istoplevel && dir=="topbar"? 0 : this._dimensions.w)
			var submenubottomedge=this._offsets.top + this._dimensions.submenuh
			var menuleft=(this._istoplevel? this._offsets.left + (dir=="sidebar"? this._dimensions.w : 0) : this._dimensions.w)
			if (submenurightedge-scrollX>ddlevelsmenu.docwidth){
				menuleft+= -this._dimensions.submenuw + (this._istoplevel && dir=="topbar" ? this._dimensions.w : -this._dimensions.w)
			}
			submenu.style.left=menuleft+"px"
			var menutop=(this._istoplevel? this._offsets.top + (dir=="sidebar"? 0 : this._dimensions.h) : this.offsetTop)
			if (submenubottomedge-scrollY>ddlevelsmenu.docheight){ 
				if (this._dimensions.submenuh<this._offsets.top+(dir=="sidebar"? this._dimensions.h : 0)-scrollY){ 
					menutop+= - this._dimensions.submenuh + (this._istoplevel && dir=="topbar"? -this._dimensions.h : this._dimensions.h)
				}
				else{ 
					menutop+= -(this._offsets.top-scrollY) + (this._istoplevel && dir=="topbar"? -this._dimensions.h : 0)
				}
			}
			submenu.style.top=menutop+"px"			
			ddlevelsmenu.positionshim(this, submenu, dir, scrollX, scrollY)
			submenu.style.visibility="visible"
		}
	}, "mouseover")
	this.addEvent(header, function(e){ 
		if (this._istoplevel){
			var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
			if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(submenu, e)) 
				ddlevelsmenu.hidemenu(submenu)
		}
		else if (!this._istoplevel && !ddlevelsmenu.isContained(this, e)){
			var headerlist=this
			ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]=setTimeout(function(){
				var submenu=ddlevelsmenu.subuls[headerlist._master][parseInt(headerlist._pos)]
				ddlevelsmenu.hidemenu(submenu)
			}, ddlevelsmenu.hideinterval)
		}
	}, "mouseout")
},
hidemenu:function(submenu){
	if (typeof submenu._pos!="undefined"){ 
		this.css(this.topitems[submenu._master][parseInt(submenu._pos)], "selected", "remove")
		this.hideshim()
	}
	submenu.style.left=0
	submenu.style.top="-1000px"
	submenu.style.visibility="hidden"
},
addEvent:function(target, functionref, tasktype) {
	if (target.addEventListener)
		target.addEventListener(tasktype, functionref, false);
	else if (target.attachEvent)
		target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
},
init:function(mainmenuid, dir){
	this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
	this.topitemsindex=-1
	this.ulindex=-1
	this.topmenuids.push(mainmenuid)
	this.topitems[mainmenuid]=[]
	this.subuls[mainmenuid]=[] 
	this.hidetimers[mainmenuid]=[] 
	if (!this.shimadded){
		this.shimmy={}
		this.shimmy.topshim=this.addshimmy(document.body) 
		this.shimmy.bottomshim=this.addshimmy(document.body)
		this.shimadded=true
	}
	var menubar=document.getElementById(mainmenuid)
	var alllinks=menubar.getElementsByTagName("a")
	this.getwindowsize()
	for (var i=0; i<alllinks.length; i++){
		if (alllinks[i].getAttribute('rel')){
			this.topitemsindex++
			this.ulindex++
			var menuitem=alllinks[i]
			this.topitems[mainmenuid][this.topitemsindex]=menuitem 
			var dropul=document.getElementById(menuitem.getAttribute('rel'))
			dropul.style.zIndex=2000
			dropul._master=mainmenuid 
			dropul._pos=this.topitemsindex 
			this.addEvent(dropul, function(){ddlevelsmenu.hidemenu(this)}, "click")
			var arrowpointer=(dir=="sidebar")? "rightarrowpointer" : "downarrowpointer"
			this.addpointer(menuitem, arrowpointer, this[arrowpointer])
			this.buildmenu(mainmenuid, menuitem, dropul, this.ulindex, true, dir)
			this.addEvent(dropul, function(e){ 
				if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(ddlevelsmenu.topitems[this._master][parseInt(this._pos)], e)){
					var dropul=this
					ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]=setTimeout(function(){
						ddlevelsmenu.hidemenu(dropul)
					}, ddlevelsmenu.hideinterval)
				}
			}, "mouseout")
			var subuls=dropul.getElementsByTagName("ul")
			for (var c=0; c<subuls.length; c++){
				this.ulindex++
				var parentli=subuls[c].parentNode
				this.addpointer(parentli.getElementsByTagName("a")[0], "rightarrowpointer", this.rightarrowpointer)
				this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false, dir) 
			}
		}
	} 
	this.addEvent(window, function(){ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions()}, "resize")
},
setup:function(mainmenuid, dir){
	this.addEvent(window, function(){ddlevelsmenu.init(mainmenuid, dir)}, "load")
}
}