亲测可用
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">
function countDown(secs,surl){
//alert(surl);
var jumpTo = document.getElementById('jumpTo');
jumpTo.innerHTML=secs;
if(--secs>0){
setTimeout("countDown("+secs+",'"+surl+"')",1000);
}
else{
location.href=surl;
}
}
</script>
</head>
<body><span id="jumpTo">5</span>秒后自动跳转到http://www.baidu.com/
<script type="text/javascript">countDown(5,'http://www.baidu.com/');</script>
</body>
</html>
