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倒计时的自动跳转.html
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title></title>
</head>
<body onload="start_timer()">
<script>
var i=3;
var timer=null;
function change()
{
var lab = document.getElementById("lab");
lab.innerText = i+"秒后自动跳转到2.html...";
i--;
if(i==0)
{
window.clearInterval(timer);
timer=null;
//window.location.href = "2.html";
var a = document.getElementById("a1");
doclick(a);
}
}
function start_timer()
{
timer = window.setInterval("change()",1000);
}
function doclick(obj)
{
javascript:location.replace(obj.href); event.returnValue=false;
}
</script>
<label id="lab">3秒后自动跳转到2.html...</label>
<a id="a1" href="2.html" onclick="doclick(this)">直接跳转到2.html</a>
</body>
</html>
原文：http://www.cnblogs.com/ipetergo/p/6295503.html