body {
   background: #ffffff;
   padding: 0;
   margin: 0;
   overflow: hidden;
   }

#main {
   background: transparent
               no-repeat
               center;
   padding: 7px;
   margin: -512px 0 0 -512px;
   position:absolute;
   top: 50%;
   left: 50%;
   width: 1024px;
   height: 768px;
   }