function setTab(name,cursel,n,obj){
		obj.t=setTimeout(function(){
			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";
			}
		},200)
		//当鼠标在规定时间内移开时，停止切换
		obj.onmouseout=function(){clearTimeout(this.t)}
	}