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

var cssdropdown={
	disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout

	//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 : what.offsetTop;

		var parentEl=what.offsetParent;
		
		var currentVisibleMenu = "";

		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){

		this.currentVisibleMenu = dropmenuID;
		
		eval("document.i_" + dropmenuID + ".src='/images/rust/" + dropmenuID + ".gif'");

		if (this.dropmenuobj!=null) //hide previous menu
		{
			this.dropmenuobj.style.visibility="hidden"
			if(tempImage != dropmenuID)
				eval("document.i_" + tempImage + ".src='/images/blue/" + tempImage + ".gif'");
		}
		tempImage = dropmenuID;
		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(){
	// alert("here");
		this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'",this.disappeardelay)
		// delayImage = "this.delayhideimage=setTimeout(\"document.i_" + this.dropmenuID + ".src='/images/blue/" + this.dropmenuID + ".gif'\",this.disappeardelay)"
		// alert(delayImage);
		eval("this.delayhideimage=setTimeout(\"document.i_" + this.currentVisibleMenu + ".src='/images/blue/" + this.currentVisibleMenu + ".gif'\",this.disappeardelay)");
	},

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