//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: Jan 1st, 06'

var cssdropdown={
//set delay in miliseconds before menu disappears onmouseout
	disappeardelay: 250, 
//No need to edit beyond here////////////////////////
	dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all,
getposOffset:function(what, offsettype){
	var totaloffset=(offsettype=="left")? what.offsetLeft+120 : what.offsetTop-23;
	var parentEl=what.offsetParent;
	while (parentEl!=null){
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
},
showhide:function(obj, e, visible, hidden){
	if (this.ie || this.firefox)this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
	if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")obj.visibility=visible
	else if (e.type=="click")obj.visibility=hidden
},
iecompattest:function(){
	return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
},
clearbrowseredge:function(obj, whichedge){
	var edgeoffset=0
	if (whichedge=="rightedge"){
		var windowedge=this.ie && !window.opera? this.iecompattest().scrollLeft+this.iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
		this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
		if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
		edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
	}else{
		var topedge=this.ie && !window.opera? this.iecompattest().scrollTop : window.pageYOffset
		var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
		this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
/*		if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up?
			edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
			if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
			edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
		}*/
	}
	return edgeoffset
},
dropit:function(obj, e, dropmenuID){
 //hide previous menu
	if (this.dropmenuobj!=null)this.dropmenuobj.style.visibility="hidden"
	this.clearhidemenu()
	if (this.ie||this.firefox){
		obj.onmouseout=function(){cssdropdown.delayhidemenu()}
		this.dropmenuobj=document.getElementById(dropmenuID)
		this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
		this.dropmenuobj.onmouseout=function(){cssdropdown.dynamichide(e)}
		this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
		this.showhide(this.dropmenuobj.style, e, "visible", "hidden")
		this.dropmenuobj.x=this.getposOffset(obj, "left")
		this.dropmenuobj.y=this.getposOffset(obj, "top");
		this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
		this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
	}
},
contains_firefox:function(a, b) {
	while (b.parentNode)if ((b = b.parentNode) == a)return true;
	return false;
},
dynamichide:function(e){
	var evtobj=window.event? window.event : e
	if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))this.delayhidemenu()
	else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))this.delayhidemenu()
},
delayhidemenu:function(){
	this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'",this.disappeardelay)
},
clearhidemenu:function(){
	if (this.delayhide!="undefined")clearTimeout(this.delayhide)
}
}