#menu a
{
    padding-top:4px;
    height:26px;
    display:block;
    float:left;
    width:auto;
    color:#FFF;
    text-decoration:none;
    font-weight:bold;
    padding-left:7px;
    padding-right:14px;
    font-size:13px;   
    background:url("../images/menu_a.gif") top right no-repeat; 

    text-align:center
}

#menu a:hover, #menu a.menu_on
{
    color:#FFF32D;
    background-position:bottom right;
}