#box_tab {
    width: 500px;
    height: 500px;
    margin: 0px 0px 0px 0px;
    }

    #box_menu{
    width: 500px;
    height: 20px;
    margin: 0;
    padding: 0;
    font-family: Tahoma, Verdana, sans-serif;
    font-size: 12px;
    }

    #box_menu li{
    display: inline;
    }


    #box_menu li a{
    padding: 10px;
    text-decoration: none;
    }