var num=50;
var divname;
var timeid;
function show(divna)
{
	
	divname=divna
	num=50;
	var div=document.getElementById(divname);
	div.style.display="block";
	div.style.background="url('img/gg5.gif') no-repeat";
	div.onmouseout=likai;
	xunhuan(divname);
}
function show1(divna)
{
	
	divname=divna
	num=50;
	var div=document.getElementById(divname);
	div.style.display="block";
	div.style.background="url('img/anniu65.gif') no-repeat";
	div.onmouseout=likai;
	xunhuan(divname);
}
function xunhuan()
{
	var div=document.getElementById(divname);
	div.style.filter="alpha(opacity="+num+")";
	if(num==80)
	{
		clearTimeout(timeid);
		return;
	}
	num+=5;
	timeid=setTimeout(xunhuan,1);
}
function likai()
{
	clearTimeout(timeid);
	var div=document.getElementById(divname);
	div.style.filter="alpha(opacity=100)";
	div.style.background="url('')";
}