<style>
.set_index{
width: 40px;
height: 40px;
background-color: #07ac72;
}
.set_index a{
text-decoration: none;
font: normal 15px/15px "宋体";
display: block;
padding: 5px;
color: #fff;
}
</style>
<div class="set_index">
<a href="javascript:;">设为首页</a>
</div>
