Mine

dl#bannerMap {
background:transparent url(mainbanner.jpg) no-repeat scroll left top;
height:500px;
margin:0pt;
padding:0pt;
position:relative;
width:720px;
}
dt {
display:none;
font-size:85%;
margin:0pt;
padding:0pt;
position:absolute;
}
dd {
font-size:85%;
margin:0pt;
padding:0pt;
position:absolute;
}
dd#home{ top: 200px; left: 200px; }
dd#homeDef a{ position: absolute; width: 301px; height: 69px; text-decoration: none; }
dd#homeDef a span{ display: none; }
dd#monitorDef a:hover{ position: absolute; background: transparent url(mainbanner.jpg) -109px -317px no-repeat; top: -10px; left: -5px; }

dd#homeDef a:hover span{
 display: block;
 text-indent: 0;
 vertical-align: top;
 color: #000;
 background-color: #F4F4F4;
 font-weight: bold;
 position: absolute;
 border: 1px solid #BCBCBC;
 bottom: 100%;
 margin: 0;
 padding: 5px;
 width: 250%;
}