#topblock {
   width: 960px;
   height: 240px;
}

#topblock div.topblockdiv {
   width: 480px;
   height: 240px;
}

#topblock div.topblockcontent {
   width: 464px;
   height: 188px;
}

#topblock div.topblockbg {
   width: 480px;
   height: 240px;
   overflow: hidden;
}