#tooltip {
    background:#FFFFFF;
    border:1px solid #666666;
    color:#333333;
    font:menu;
    margin:0px;
    padding:3px 5px;
    position:absolute;
    visibility:hidden;
    z-index: 100;
}
#link_cat_ref {
    display: block; 
    font-size:90%; 
    white-space:nowrap; 
    color:#929292; 
    text-decoration:none;
}