#back2sindex{
   position: absolute; width: 940px; top: 20px; left: 0px; height: 350px;
   margin: 0;
   padding: 0;
   padding: 0;
   background-image: url('images/back2s.jpg');
   background-repeat: repeat-y;
}

#back3dindex{
   position: absolute; width: 940px; top: 370px; left: 0px; height: 20px;
   margin: 0;
   padding: 0;
   padding: 0;
   background-image: url('images/back3d.jpg');
   background-repeat: no-repeat;
}