<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>无标题页</title> <style type="text/css"> ul{list-style:none;} li{float:left; width:56px; height:56px; line-height:56px; text-align:center; vertical-align:middle; cursor:pointer;} li span{display:inline-block; height:30px; vertical-align:middle; width:0;} li img{vertical-align:middle;} .aa{background:url(1.jpg);} </style> <script type="text/javascript" src="cn/js/jquery-1.7.1.min.js"></script> <script type="text/javascript"> $(function() { $("li").click(function() { $(this).addClass("aa").siblings().removeClass("aa"); }); }); </script> </head> <body> <ul> <li><img src="images/loading.gif" /><span> </span></li> <li>2</li> <li class="aa">3</li> <li>4</li> <li>5</li> </ul> </body> </html>