//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: 0, //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;
		while (parentEl!=null)
		{
			totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
			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()", 10)
	},
	
	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
			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)
	{
		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(e){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+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) //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"))
				}
			}
		}
	}
}

}