#menu {
height:2em; 
text-align:center;
white-space:nowrap;
font-weight:bold;
}

#menu a {
padding: 0.5em 0.3em;
position:relative; 
text-decoration:none;
color:#1919B3;
}

#menu  a:hover {
color:#71A0FF;
text-decoration:none;
background: transparent url(/images/tab_square.gif) no-repeat bottom center;
}