效果如下：
前台代码：
<div id="Men">
<a href ="addnewbooks.aspx" target="_blank"><span class="left"></span>增加新书<span class="right"></span></a>
<a href ="fengxingbookManager.aspx" target="_blank"><span class="left"></span>更新书库<span class="right"></span></a>
<a href ="fengxingbookManager.aspx" target="_blank"><span class="left"></span>网页动态<span class="right"></span></a>
<a href ="dynamicManager.aspx" target="_blank"><span class="left"></span>促销管理<span class="right"></span></a>
<a href ="fengxingbookManager.aspx" target="_blank"><span class="left"></span>特价管理<span class="right"></span></a>
<a href ="Managerbooks.aspx" target="_blank"><span class="left"></span>书籍浏览<span class="right"></span></a>
</div>
css：
#Men
{
margin: auto;
font-family: 华文行楷;
font-size: 20px;
width: 135px;
padding: 3px;
background-color: #ccc;
border: 1px solid #ccc;
height: 170px;
}
#Men a,#Men a:visited
{
border-left: 8px solid #9ab
