javascript倒计时调转页面

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"/>
<title>JavaScript控制页面5秒后自动跳转的代码</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.jb51.net/
<script type="text/javascript">
countDown(5,'http://www.jb51.net/');
</script>
</body>
</html>

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