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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>webrx</title>
<script src="../jquery-3.3.1.js"></script>
</head>
<body>
<p ></p>
<script>
var i=5;
setInterval(function () {
$("p").html(i+"秒后进入百度");
if(i==0){
window.location.href="http://www.baidu.com";
}
i--;
},1000);
</script>
</body>
</html>
结果：
