// JavaScript Document
var idtt;

var cssdropdown={
	disappeardelay: 250, 
	disablemenuclick: false, 
	enableswipe: 1, 
	enableiframeshim: 1, 
	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) 
		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)" 
			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)  
			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){ 
				edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
				if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) 
				edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
			}
		}
		return edgeoffset
	},
	dropit:function(obj, e, dropmenuID){
		if (this.dropmenuobj!=null) 
		this.dropmenuobj.style.visibility="hidden" 
		this.clearhidemenu()
		if (this.ie||this.firefox){
			obj.onmouseout=function(){cssdropdown.delayhidemenu();}
			obj.onclick=function(){return !cssdropdown.disablemenuclick;} 
			this.dropmenuobj = document.getElementById(dropmenuID)
			if(!this.dropmenuobj) return;
			//document.getElementById(dropmenuID).className = "tty";
			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 - 7 + "px";
			this.positionshim() 
		}
	},
	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'
		document.getElementById(idtt).className = "";
	},
	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) 
	},
	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){
                        idtt = this.getAttribute("rel") + "_menu";
                        document.getElementById(idtt).className = "tty";
						var event=typeof e!="undefined"? e : window.event
						cssdropdown.dropit(this,event,this.getAttribute("rel"))
					}
				}
			}
		}
		if (window.createPopup && !window.XmlHttpRequest){ 
			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") 
		}
	}
}

//鼠标移动上
function butoomver(id,nameid){
	document.getElementById(id).style.display = "none";
	document.getElementById(nameid).style.display = "";
}
//鼠标移开
function butoomut(id,nameid){
	document.getElementById(id).style.display = "";
	document.getElementById(nameid).style.display = "none";
}