//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: November 14th 06- added iframe shim technique

	var cssdropdown = {
		disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
		disablemenuclick: true, //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
		enableiframeshim: 1, //enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 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(){
			
			this.dropmenuobj.style.clip = "rect(0 auto " + parseInt( this.dropmenuobj.offsetHeight ) + "px 0)";
			return;
			
			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(){ window.location = this.getAttribute("href"); cssdropdown.delayhidemenu(); 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";
				this.positionshim(); //call iframe shim function
			}
		},

		positionshim:function(){ //display iframe shim 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';
			}
		},

		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'; cssdropdown.hideshim()",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"));
						}
					}
				}
			}
			
			if (window.createPopup && !window.XmlHttpRequest){ //if IE5.5 to IE6, create iframe for iframe shim technique
				document.write('<IFRAME id="iframeshim"  src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>');
				this.shimobject=document.getElementById("iframeshim"); //reference iframe object
			}
		}

	}