过3秒钟跳转到主页 实现方法
前台：
<script type="text/javascript">
var secs = 3;
var URL;
function Load(url)
{
URL = url;
for (var i = secs; i >= 0; i--)
{
window.setTimeout('doUpdate(' + i + ')', (secs - i) * 1000);
}
}
function doUpdate(num)
{
document.getElementById('ShowDiv').innerHTML = '将在' + num + '秒后自动跳转到主页';
if (num == 0) { window.location = URL; }
}
</script>
<body onload=Load(url)>
<div id="ShowDiv">
</div>
</body
