这段代码死活看不到错误，究竟哪里错了

[张看]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN">
<head>
<title>新建网页</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="description" content="" />
<script>
function find(){

var lis=document.getElementsByTagName('li');
var patt=/^\w+@\w+(\.\w+)+$/;
var i=0;

console.log(lis.length);
console.log(lis[1].innerHTML);


while(i<lis.length){
if(patt.exec(lis[i].innerHTML)!==null){
lis[i].style.background='yellow';
}
i++;
}
}
</script>

</head>
<body>
<input type="button" value="标注有邮箱的人" onclick="find();" />
<ul>
<li>张飞</li>
<li>刘备<[e-mail]></li>
<li>关羽</li>
<li>赵云<[e-mail]></li>
</ul>
</body>
</html>

[dj10129pop]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"> <head> <title>新建网页</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="description" content="" /> <script> function find(){ var lis=document.getElementsByTagName('li'); var patt=/\w+@\w+(\.\w+)+/; var i=0; while(i<lis.length){ if(patt.test(lis[i].innerHTML)!==false){ lis[i].style.background='yellow'; } i++; } } </script> </head> <body> <input type="button" value="标注有邮箱的人" onclick="find();" /> <ul> <li>张飞</li> <li>刘备<[e-mail]></li> <li>关羽</li> <li>赵云<[e-mail]></li> </ul> </body> </html>

[mc_dv]

不会调试吗.?

[张看]

不会。跟我讲讲怎么调试的基本思路。 或者要用什么代码分析器 不好意思，我刚学

[slwsss]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"> <head> <title>新建网页</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="description" content="" /> <script> function find(){ var lis=document.getElementsByTagName('li'); var patt=/\w+@\w+(\.\w+)+/; var i=0; console.log(lis.length); console.log(lis[1].innerHTML); while(i<lis.length){ if(patt.exec(lis[i].innerText)){ lis[i].style.background='yellow'; } i++; } } </script> </head> <body> <input type="button" value="标注有邮箱的人" onclick="find();" /> <ul> <li>张飞</li> <li>刘备<[e-mail]></li> <li>关羽</li> <li>赵云<[e-mail]></li> </ul> </body> </html>