报错信息是 sum is not defined 求帮助

源自：8-17 编程练习

报错信息是 sum is not defined 求帮助

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>对象</title>

<script>

window.onload=function(){

var i=5;

function sum(){

document.getElementsByTagName('span')[0].innerHTML = i;

i--;

if(i==0){

location.assign("https://www.baidu.com");

}

// setTimeout("sum()",1000);

}

// sum();

setInterval("sum()",1000);

}

</script>

</head>

<body>

<h3>操作成功</h3>

<p><span>5</span><span>秒后自动跳转</span><a href="javascript:history.back()">返回</a></p>

<!--

<script>

var i=5;

function sum(){

document.getElementsByTagName('span')[0].innerHTML = i;

i--;

if(i==0){

location.assign("https://www.baidu.com");

}

setTimeout("sum()",1000);

}

sum();

</script>

-->

</body>

</html>

提问者：慕斯卡1577277 2016-06-11 17:50

个回答

qq__LZY__0

2016-06-12 10:18:53

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>对象</title>
<script>
window.onload=function(){
setInterval(function()
{
var i=5;
document.getElementsByTagName('span')[0].innerHTML = i;
i--;
if(i==0){location.assign("https://www.baidu.com");}
},1000)
}

</script>
</head>
<body>
<h3>操作成功</h3>
<p><span>5</span><span>秒后自动跳转</span><a href="javascript:history.back()">返回</a></p>

</body>
</html>
貌似这样子就没什么错了

1
下忍

2016-06-11 22:50:13

定义sum var sum；

0