Überschrift
#oben {
background-color: #FFCC00;
height: 90px;
width: 740px;
position: absolute;
z-index: 1;
left: 0px;
top: 0px;
padding: 5px;
}

#spalte_mitte {
background-color: #CCCCCC;
padding: 10px;
height: 400px;
width: 380px;
position: absolute;
z-index: 3;
left: 180px;
top: 110px;
}
#spalte_rechts {
background-color: #FFCC00;
padding: 10px;
height: 400px;
width: 140px;
position: absolute;
z-index: 4;
left: 590px;
top: 110px;
}