#left {
  display: none;
  width: 0;
}

#middle {
  float: left;
  width: 637px;
}

#right {
  display: block;
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0; 
  width: 293px;
}

#right_1 {
}

#right_2 {
}