.popcom
{
width:300px;
background:#000000;
padding:5px;

position:absolute;
 filter: alpha(opacity:85);
 KHTMLOpacity: 0.85;
 MozOpacity: 0.85;
 opacity: 0.85;
top: 0px;
left: 0px;
z-index:4;
visibility:hidden;
}