//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)


var cssdropdown = {
disappeardelay: 300, //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.showdelay>1000) {
		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
		} 
	else {
		this.showdelay+=50
	}
	
	this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 20)
},

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
},

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.showdelay=0
			this.swipeeffect()
		}
		
		obj.visibility="visible"
		this.css(this.asscmenuitem, "selected", "add")
	}
	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
		var windowedge = 757
		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.hidemenu() //hide menu
	
	this.clearhidemenu()
	this.dropmenuobj=document.getElementById(dropmenuID) //reference drop down menu
	this.asscmenuitem=obj //reference associated menu item

   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"
		
		if (this.ie)
			this.separator = 1
		if (this.firefox)
			this.separator = 0
		
		this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+this.separator+"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.hidemenu()", this.disappeardelay) //hide menu
},

hidemenu:function(){
	this.css(this.asscmenuitem, "selected", "remove")
	this.dropmenuobj.style.visibility='hidden'
	this.dropmenuobj.style.left=this.dropmenuobj.style.top="-1000px"
},

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"))
				}
			}
		}
	}
}

}