dl#browser {
width: 900px;
margin: 0; 
padding: 0;
position: relative;
}

dl#browser dt {display: block; width: 280px; margin: 0; padding: 0; position: relative;}
dl#browser dd {display: block; width: 620px; height: 549px; background: transparent; margin: 0; padding; 0;}

dl#browser dt a {padding: 0px; display: block; text-indent: -5000px; overflow: hidden; margin: 0;}
dl#browser dd a {padding: 10px; display: block; text-indent: -5000px; overflow: hidden; margin: 0; height: 529px; width: 600px;}

dl#browser dt a.feedback {background: url(feedback.png) top left; height: 50px;}
dl#browser dt a.elections {background: url(elections.png) top left; height: 49px;}
dl#browser dt a.referenda {background: url(referenda.png) top left; height: 48px;}
dl#browser dt a.council {background: url(council.png) top left; height: 58px;}
dl#browser dt a.exec {background: url(exec.png) top left; height: 82px;}
dl#browser dt a.officers {background: url(officers.png) top left; height: 53px;}
dl#browser dt a.policy {background: url(policy.png) top left; height: 65px;}
dl#browser dt a.reference {background: url(reference.png) top left; height: 47px;}
dl#browser dt a.structure {background: url(structure.png) top left; height: 48px;}
dl#browser dt a.campaigns {background: url(campaigns.png) top left; height: 49px;}

dl#browser dd.feedback a {background: url(fback_x.png);}
dl#browser dd.elections a {background: url(elec_x.png);}
dl#browser dd.referenda a {background: url(refu_x.png);}
dl#browser dd.council a {background: url(council_x.png);}
dl#browser dd.exec a {background: url(exec_x.png);}
dl#browser dd.officers a {background: url(off_x.png);}
dl#browser dd.policy a {background: url(policy_x.png);}
dl#browser dd.reference a {background: url(refer_x.png);}
dl#browser dd.structure a {background: url(str_x.png);}
dl#browser dd.campaigns a {background: url(cam_x.png);}

dl#browser dt a:hover, dl#browser dt a.hover {background-position: bottom left;}