//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: June 14th, 06' v2.0

var cssdropdown={
	disappeardelay: 500, //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;
		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.styl e.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"))
}
}
}
}
}

}