//Drop Down Tabs Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Created: May 16th, 07'

var tabdropdown={
	disappeardelay: 200, 			// 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?
	enableiframeshim: 1, 			// 1 or 0, for true or false
	dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, previousmenuitem:null,
	currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), 
	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;
	},
	showhide:function(obj, e, obj2){
		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(obj2.parentNode.className.indexOf("default")==-1) { obj2.parentNode.className="selected" }
			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.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
			if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)
				edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
		} else {
			var topedge=this.ie && !window.opera? this.standardbody.scrollTop : window.pageYOffset
			var windowedge=this.ie && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18
			this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
			if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){
				edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
			if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure)
				edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
			}
			this.dropmenuobj.firstlink.style.borderTopWidth=(edgeoffset==0)? 0 : "1px";
		}
		return edgeoffset
	},
	dropit:function(obj, e, dropmenuID){
		if(this.dropmenuobj!=null){
			this.dropmenuobj.style.visibility="hidden";
			if(this.previousmenuitem!=null && this.previousmenuitem!=obj){
				if(this.previousmenuitem.parentNode.className.indexOf("default")==-1)
					this.previousmenuitem.parentNode.className=""
			}
		}
		this.clearhidemenu()
		if (this.ie||this.firefox){
			obj.onmouseout=function(){tabdropdown.delayhidemenu(obj)}
			obj.onclick=function(){return !tabdropdown.disablemenuclick}
			this.dropmenuobj=document.getElementById(dropmenuID)
			this.dropmenuobj.onmouseover=function(){tabdropdown.clearhidemenu()}
			this.dropmenuobj.onmouseout=function(e){tabdropdown.dynamichide(e, obj)}
			this.dropmenuobj.onclick=function(){tabdropdown.delayhidemenu(obj)}
			this.showhide(this.dropmenuobj.style, e, obj)
			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"
			this.previousmenuitem=obj;
			this.positionshim();
		}
	},
	contains_firefox:function(a, b) {
		while (b.parentNode)
			if ((b = b.parentNode) == a)
				return true;
		return false;
	},
	dynamichide:function(e, obj2){
		var evtobj=window.event? window.event : e
		if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
			this.delayhidemenu(obj2)
		else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
			this.delayhidemenu(obj2)
	},
	delayhidemenu:function(obj2){
		this.delayhide=setTimeout(function(){tabdropdown.dropmenuobj.style.visibility='hidden'; if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu
	},
	clearhidemenu:function(){ if (this.delayhide!="undefined") clearTimeout(this.delayhide) },
	positionshim:function(){
		if (this.enableiframeshim && typeof this.shimobject!="undefined"){
			if (this.dropmenuobj.style.visibility=="visible"){
				this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
				this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
				this.shimobject.style.left=this.dropmenuobj.style.left
				this.shimobject.style.top=this.dropmenuobj.style.top
			}
			this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
		}
	},
	hideshim:function(){ 
		if (this.enableiframeshim && typeof this.shimobject!="undefined") this.shimobject.style.display='none'; 
	},
	isSelected:function(menuurl){
		var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
		return (tabdropdown.currentpageurl==menuurl)
	},
	init:function(menuid, dselected) {
		this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body; 
		var menuitems=document.getElementById(menuid).getElementsByTagName("a");
		for (var i=0; i<menuitems.length; i++) {
			if (menuitems[i].getAttribute("rel")) {
				var relvalue=menuitems[i].getAttribute("rel");
				document.getElementById(relvalue).firstlink=document.getElementById(relvalue).getElementsByTagName("a")[0];
				menuitems[i].onmouseover=function(e) {
					var event=typeof e!="undefined"? e : window.event;
					tabdropdown.dropit(this, event, this.getAttribute("rel"));
				}
			}
			if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[i].href)){
				menuitems[i].parentNode.className+=" selected default";
				var setalready=true;
			} else if (parseInt(dselected)==i) { 
				menuitems[i].parentNode.className+=" selected default"; 
			}
		}
	}
}