div.header {
  background: #000 url(../images/top_bg_de.jpg) no-repeat left top;
  }

.leftside {
  background-image: url(../images/blackbox_topleft_bg_de.jpg); 
  }

.rightside {
  background: url(../images/redbox_bottomright_bg.jpg) no-repeat left bottom; 
  }