时间不动a
<!DOCTYPE html>
<html>
<head>
<title>浏览器对象</title>
<meta http-equiv="Content-Type" content="text/html; charset=gkb" />
<style type="text/css">
</style>
</head>
<body>
<h2>操作成功</h2>
<p><span id=time>5</span>秒后跳转到主页<a href="javascript:history.back()">返回</a></p>
<script>
var i=document.getElementById("time").innerHTML;
var n=seInterval("if(i>0){document.getElementById('time').innerHTML=--i;}else{location.assign("http://www.imooc.com/"),1000);
</script>
</html>
