//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: June 14th, 06'

var cssdropdown={
disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link?
enableswipe: 1, //enable swipe effect? 1 for yes, 0 for no

//No need to edit beyond here////////////////////////
dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,

getposOffset:function(what, offsettype)
{
	var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
	var parentEl=what.offsetParent;
	if(!this.firefox)
	{
	//while (parentEl!=null)
	//{
		totaloffset=(offsettype=="left")? totaloffset+0 : totaloffset+430;
	//	parentEl=parentEl.offsetParent;
	//}
	}
	return totaloffset;
},

swipeeffect:function(){
if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight)){
this.bottomclip+=10+(this.bottomclip/10) //unclip drop down menu visibility gradually
this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
}
else
return
this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 20)
},

showhide:function(obj, e){
if (this.ie || this.firefox)
this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover"){
if (this.enableswipe==1){
if (typeof this.swipetimer!="undefined")
clearTimeout(this.swipetimer)
obj.clip="rect(0 auto 0 0)" //hide menu via clipping
this.bottomclip=0
this.swipeeffect()
}
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
			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
			edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
	}
	return edgeoffset
},

dropit:function(obj, e, dropmenuID)
{
	if (this.dropmenuobj!=null) //hide previous menu
		this.dropmenuobj.style.visibility="hidden" //hide menu
	this.clearhidemenu()
	if (this.ie||this.firefox)
	{
		obj.onmouseout=function()
		{
			cssdropdown.delayhidemenu()
		}
		obj.onclick=function()
		{
			return !cssdropdown.disablemenuclick
		} //disable main menu item link onclick?
		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)
		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+"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) //hide menu
},

clearhidemenu:function(){
if (this.delayhide!="undefined")
clearTimeout(this.delayhide)
},

startchrome:function()
{
	for (var ids=0; ids<arguments.length; ids++)
	{
		var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
		for (var i=0; i<menuitems.length; i++)
		{
			if (menuitems[i].getAttribute("rel"))
			{
				var relvalue=menuitems[i].getAttribute("rel")
				menuitems[i].onmouseover=function(e)
				{
					var event=typeof e!="undefined"? e : window.event
					cssdropdown.dropit(this,event,this.getAttribute("rel"))
				}
			}
		}
	}
}

}