<!DOCTYPE html>
<html>
<head>
<title>浏览器对象</title>
<meta http-equiv="Content-Type" content="text/html; charset=gkb"/>
</head>
<body>
<h4>操作成功</h4>
<p>
<b id="select">5</b>自动返回主页<a href="javaScript:goBack();">返回</a>
</p>
<script type="text/javascript">
var sel=document.getElementById("select");
var i=5;
function set(){
sel.innerHTML=i;
i--;
setTimeout("set()",1000);
if(i==1){
window.location.href="http://www.imooc.com";
}
}
function goBack(){
window.history.back();
}
</script>
</body>
</html>
![[웹 프런트엔드] Node.js 빠른 시작](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
因为根本没有调用set函数啊，我加上一个调用就行了
<script type="text/javascript"> setTimeout("set()",1); var sel=document.getElementById("select"); var i=5; function set(){ sel.innerHTML=i; i--; setTimeout("set()",1000); if(i==1){ window.location.href="http://www.imooc.com"; } }