很简单，也模板一下。
<!DOCTYPE html>
<html>
<head>
<title>自动跳转页面</title>
</head>
<body>
<!--先编写好网页布局-->
<h1>操作成功</h1>
<div><span id= "miao" >5</span>秒后回到主页
<a href="#" onclick="Clickback()">返回</a></div>
<script type="text/javascript">
var miaoValue = document.getElementById("miao").innerHTML;
function Clickback() {
window.history.back();
}
function clock() {
miaoValue --;
document.getElementById("miao").innerHTML = miaoValue;
if(miaoValue === 0 ) {
window.location.assign("http://www.baidu.com");
}
}
setInterval(clock,1000)
</script>
</body>
</html>
