Code:
ul.menu {
}

ul.menu li{
display: inline;
list-style: none;
color: #fff;
text-align: center;
margin: 3px;
border-radius: 3px;
moz-border-radius: 3px;
cursor: pointer;
}

ul.menu li:hover{
color: #fff;
padding: 3px;
background-image: url('http://mocha-mods.net/Home/img/bg_black.jpg');
}