判断li是否有样式的js代码_javascript技巧

<meta http-equiv="Content-Type" content="text/html; charsetGB2312"> <title>判断li是否有样式_www.jb51.net </title> <style type="text/css"> .myli{ color:red; } </style> <script language="JavaScript" type="text/javascript"> window.onload = function(){ var ul = document.getElementById("myul"); var lis = ul.getElementsByTagName("li"); for(var i = 0; i < lis.length;i++){ if(lis[i].className == ""){ lis[i].className = "myli"; } } } </script> <ul id="myul"> <li>A</li> <li class="myli">B</li> <li>C</li> </ul>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]