<!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>