body {background: black;}
div#content {background: #468 url(../images/hackmaster.jpg) 0 0 no-repeat fixed;}
div#links a {background: #ACE;}
div#links a:hover {background: blue;}
div#links a span {display: none;}
div#links a:hover span {display: block;
   position: absolute; top: 200px; left: -10px; width: 150px;
   padding: 5px; margin: 10px; z-index: 100;
   color: yellow; background: #468;
   font: 14px Verdana, sans-serif; font-weight: bold; text-align: center;}