例子，js倒计时代码。
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>60刷新本页_js倒计时_www.jb200.com</title>
<script type="text/javascript">
var t;
t=60;
function shua()
{
t=t-1;
document.getElementById("hints").innerHTML="离下次刷新时间还有 "+t+" 秒";
if (t==0)
{
document.location.reload();
}
}
</script>
</head>
<body onload="window.setInterval(shua,1000);">
<center>
<font id="hints" style="color:blue" >离下次刷新时间还有60秒</font><br/>
<center>
</body>
</html>