body { overflow:auto; 
font: 8pt Verdana, Geneva, Arial, Helvetica, sans-serif;
 }
div#Superior { position:absolute; top:0; left:0; width:100%; height:50px; overflow:auto; }
div#Izquierda { position:absolute; top:50px; left:0; width:300px; height:85%; overflow:auto; 
 background: blue;
}
div#bloque { position: absolute; top:50px; left:300px;  height:85%; overflow:auto; 
 background: red; padding-left:180px;
}
div#Centro { position: relative; top:0%; right:150px; width:100%;  height:100%; overflow:auto; 
  background: red;
}
div#Derecha { position: absolute; top:0%; right:0%; width:150px; height:100%; overflow:auto; 
 background:green;
}
div#Bajo { position: absolute; bottom:0%; left:0%; height:50px;  width:100%; overflow:auto; 
 background:black; color:yellow;
}