怎么在这段话

[code=php<h2>ssss：</h2>
<dl>
<dd><img src="style/images/img18.png"/></dd>
<dd><span></span></dd>
<dd><img src="style/images/img19.png"/></dd>
<dd><span></span></dd>
<dd><img src="style/images/img20.png"/></dd>
</dl>
<p class="wk_desc">aaaa<br />bbbb.<br />cccc！</p>
    <a href="######" class="btn" target="_blank"">这里怎么添加下面的鼠标放上去自动出现图的代码</a>][/code]下面是弹窗的代码：
<body>
<style type="text/css">
<!--
.thumbnail{position:relative;z-index:0;}
.thumbnail:hover{background-color:transparent;z-index:50;}
.thumbnail span{position:absolute;background-color:#FFFFE0;left:-1000px;border:1px dashed gray;visibility:hidden;color:#000;text-decoration:none;padding:5px;}
.thumbnail span img{border-width:0;padding:2px;}
.thumbnail:hover span{visibility:visible;top:10px;left:280px;}
p{margin-top:200px}
-->
</style>
<a class="thumbnail" href="#">
<---- 想看美女吗？把鼠标放这里吧----><br>
<span><img src="http://pic.veryhuo.com/allimg/1004/1_100424222508_3.jpg">
</span></a>
</body>