<style type="text/css">
#banner {
height: 100px;
left: 25px;
position: absolute;
top: 50px;
width: 725px;
z-index: 1
}

#leftmenu {
height: 400px;
left: 25px;
position: absolute;
top: 140px;
width: 125px;
z-index: 2
}

#main {
height: 400px;
left: 180px;
position: absolute;
top: 140px;
width: 430px;
z-index: 3
}

#rightmenu {
height: 400px;
left: 625px;
position: absolute;
top: 140px;
width: 150px;
z-index: 4
}
</style>