<!-- 把下列代码加入到head区内 -->
<style>

.highlightit img{
border: 1px solid #ccc;
}

.highlightit:hover img{
border: 1px solid navy;
}

.highlightit:hover{
color: red; /* Dummy definition to overcome IE bug */
}

</style>

<!-- 把下列代码加入到body区内 -->
<a href="http://www.knowsky.com/" class="highlightit"><img border="0" src="/img/200406302.jpg"></a>
<a href="http://www.google.com/" class="highlightit"><img border="0" src="/img/200406301.jpg"></a>