/*
 *for yidianda.com index.html tab style
 *edit by yangwulin 1/4/2009.
 */
function setTab(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con=document.getElementById("con_"+name+"_"+i);
  menu.className=i==cursel?"tab_active_"+name:"tab_normal_"+name;
  con.style.display=i==cursel?"block":"none";
 }
}
//function anTab(name,pre) {
//   for(i=1;i<=2;i>=6;i++){
//  var pre=document.getElementById(prepic);
//  var con=document.getElementById("con_"+name+"_"+i);
//  var confre=document.getElementById("con_"+name+"_"+i-1);
//  con.style.display="none";
//  confre.style.display="block";
//   }
//}
//ÏÔʾÒþ²Øͼ²ãstart
function nTab_zone(num,no,name,cl_name){
	for(var i=1;i<=no;i++){
	if(i!=num)
	{
		document.getElementById(name+"_"+i).className="";

document.getElementById(name+"_nav_"+i).style.display="none";
	}else{

document.getElementById(name+"_nav_"+num).style.display="block";
		document.getElementById(name+"_"+num).className="on";
		if(num/no>0.5)
		{

document.getElementById(name+"_nav_"+num).className=cl_name+"_r";
		}else{

document.getElementById(name+"_nav_"+num).className=cl_name;
		}
	}
	}
}
function clearforzone(name,num,evt)
{
	evt=evt?evt:(window.event?window.event:null);
	var srcElement = evt.srcElement ? evt.srcElement : evt.target;
	var toElement = evt.toElement;

if(!ToChildElement(document.getElementById(name+"_nav_"+num),toElement))
	{
		document.getElementById(name+"_"+num).className="";

document.getElementById(name+"_nav_"+num).style.display="none";
	}

}
//--><!]]>
//ToChildElement(srcTarget, window.event.toElement)
function ToChildElement(parent, child) { 
	if(parent == null || child == null) return false; 
	for(var i=0; i <parent.childNodes.length; i++){ 
		if(child == parent.childNodes[i]){ 
		return true;            
		} 
	} 
	for(var i=0; i <parent.childNodes.length; i++){ 
		if(ToChildElement(parent.childNodes[i], child)){ 
		return true; 
		}      
	} 
	return false;
}
if(!document.all)
{
	Event.prototype.__defineGetter__("toElement",   function   ()   {   
	var   node;   
	if   (this.type   ==   "mouseout")   
	node   =   this.relatedTarget;   
	else   if   (this.type   ==   "mouseover")   
	node   =   this.target;   
	if   (!node)   return;   
	 while   (node.nodeType   !=   1)   node   =   node.parentNode;   
	return   node;   
	});
}