div com mouseover

Colocar no "head"

<style type="text/css">

.liga a {
display:block;
background-color:#FF9999;
text-decoration: none;
padding: 2px;
margin-bottom: 5px;
text-align: center;
border: 1px solid #000;
width: 100px; }

.liga a:hover {
color:#FFFFFF;
background-color:#6633FF}

</style>

Colocar no "body"
<div class="liga"><a href="#">ligação</a></div>