#menue { 
 position: absolute; left:0px; top:0px;
 z-index:2;
 }

#mitte {
 position:absolute; left:0px; top:0px;
 border-left: 190px solid #A0A0A4;
 width:100%;
 }

#oben { 
 border-left: 15px solid #fff;}