为什么不能直接调用呢？
//为什么不可以直接调用count()函数呢？ 如果直接调用的话，就出现上面的错误。
//源码如下：
<!DOCTYPE html>
<html>
<head>
<title>浏览器对象</title>
<meta http-equiv="Content-Type" content="text/html; charset=gkb"/>
</head>
<body>
<!--先编写好网页布局-->
<h2>操作成功</h2>
<script>
secs = 5;
function count()
{
document.getElementById("sec").innerHTML = secs;
//document.getElementById("sec").value = secs;
--secs;
if(secs == 1)
location.replace("http://www.imooc.com");
setTimeout(count, 1000);
}
count();
//setTimeout(count, 0); 这样使用就没问题了！
</script>
<span><i id="sec">5</i>秒后返回主页<a href="https://www.baidu.com">返回</a></span>
</body>
</html>
AIxer浏览 1568回答 1
1回答
-
__innocence
1、定义变量敢不敢使用关键字var secs = 5;2、敢不敢把JavaScript写在文档下面？ <!DOCTYPE html> <html> <head> <title>浏览器对象</title> <meta http-equiv="Content-Type" content="text/html; charset=gkb"/> </head> <body> <!--先编写好网页布局--> <h2>操作成功</h2> <span><i id="sec">5</i>秒后返回主页<a href="https://www.baidu.com">返回</a></span> <script> var secs = 5; function count() { document.getElementById("sec").innerHTML = secs; //document.getElementById("sec").value = secs; --secs; if(secs == 1) location.replace("http://www.imooc.com"); setTimeout(count, 1000); } count(); //setTimeout(count, 0); 这样使用就没问题了！ </script> </body> </html> -
慕瓜9220888
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