#left-col {
position: absolute;
left: 0px;
top:0px;
width:200px;
}
#middle-col {
background-color:#FFFFFF;
margin: 0px 200px 0px 200px;
height:300px;
}
#right-col {
position:absolute;
right: 0px;
top:0px;
width:200px;
}