转：纯CSS实现“鼠标移过显示层”效果

利用<a>标签的a:hover状态触发鼠标移过的动作，其中未触发状态显示为单个图片。兼容IE6/7/8以及FF/Chrome等主流浏览器。以下是图示及完整代码。

原文：http://www.cnblogs.com/eecc/articles/2225473

<!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" lang="zh-CN">
<head>
<title>对话商业领袖_网易财经</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"/>
<meta http-equiv="Content-Language" content="zh-CN"/>
<meta content="all" name="robots"/>
<meta name="author" content="Netease"/>
<meta name="Copyright" content="Netease"/>
<meta name="keywords" content=""/>
<base target="_blank"/>
<style>
*{margin:0px;padding:0px;}
body { text-align:left; font-size:12px;}
ul.onMShow {width: 110px;}
ul.onMShow li {list-style:none; background-position:left top; background-repeat:no-repeat;}
ul.onMShow li a {position: relative;display:block; width:200px; height:50px;border:none;}
ul.onMShow li a div {display: none;}
ul.onMShow li a:hover {background::none;display:block; width:auto;}/*此处需定义宽度，否则IE6下无法正常显示*/
ul.onMShow li a:hover div{display:block;position: absolute;padding:5px;width: 272px;left:0px;top: 0px;border: 1px solid #BDBDBD;background-color: #E4F6FF;cursor:pointer;}
ul.onMShow li a img {width:80px;height:80px;border:none;display:block;position: absolute;top:5px;left:5px;}
ul.onMShow li dl {width:180px;float:right;color: #000;line-height:20px;}
ul.onMShow li dl dd span {font-weight: bold;color: #000; margin-right:5px;}
ul.onMShow li dl dd h5 { font-size:12px; color:#979797; display:inline; font-weight:normal;}
</style>
</head> 
<body>
<ul class="onMShow">
<li style="background-image:url(http://img4.cache.netease.com/stock/2009/9/5/2009090523262247607.png)"><a href="http://money.163.com/09/0703/18/5DALA0IV002526O5.html"><br /><div><img src="http://img3.cache.netease.com/stock/2009/9/5/2009090523262766842.png" alt="常德传"/>
<dl>
    <dd><span>常德传</span><h5>青岛港集团董事局主席</h5></dd>
    <dd>在困难的时候企业就是要手拉手，肩并肩，不能想单打独斗，抱团合作是唯一出路。</dd>
</dl></div></a></li>
</ul>
</body>
</html>