function zahe_1(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?"hover":""; 
			con.style.display=i==cursel?"block":"none"; 
		} 
 } 
 
 function tab(){
var li=document.getElementById("tab").getElementsByTagName("span");
for(var i=0;i<span.length;i++){
span[i].onmouseover=function(){
this.className="tabs";}
span[i].onmouseout=function(){
this.className="";}
}
}