ul.top_menu {
    display: block;
    height: 52px;
    list-style: none outside none;
    margin: 0;
    overflow: hidden;
    padding: 0;
}
ul.top_menu li {
    display: block;
    float: left;
    padding: 20px 15px 10px;
}
ul.top_menu li a {
    color: white;
    font-size: 12px;
    text-decoration: none;
}
ul.top_menu li a:hover {
    text-decoration: underline;
}