<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
<!--
.aljx_list{width:790px; height:130px;  overflow:hidden; padding-left:10px;}
.aljx_a {width:153px; height:130px; display:block; margin:5px 5px 0 0; background:#D0D4D7; float:left;z-index:1}
.aljx_a .aljx_title{color:#FFF; font-size:20px; font-weight:bold; margin:10px 0 0 10px; display:block; z-index:555}
.aljx_a span.hover {position: absolute;display: block;width:153px; height:125px;
background:#60bdf2; z-index:2}
.aljx_a span.hover .aljx_title { color:#FFF; }
-->
</style>
</head><body><div class="bd">
<ul class="lh">
  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('.aljx_a').wrapInner('<span class="hover"></span>')
.each(function () {
$('span.hover').css('opacity', 0).hover(function () {
$(this).stop().fadeTo(350, 1);
}, function () {
$(this).stop().fadeTo(350, 0);
});
});
});
          </script>
          
<div class="aljx_list" >
                    <a href="#" class="aljx_a" ><div class="aljx_title" >案例1</div><span class="aljx_ctnt" style="display:block; margin:10px 10px 0 10px; font-weight:bold; color:#333">本案例设计到以个以桥梁为住的斐波那契数列</span></a>
                    <a href="#"  class="aljx_a" >案例1</a>
             
                </div>
</ul>

</div></body>
</html>jQuery