#topDIv {
    float: left;
    width: 100%;
}
#leftColumn {
    float: left ;
    width: 250px;
}
#middleColumn {
    float: left;
    width: 575px;
    margin-left: 10px;
}
#rightColumn {
    float: left;
    width: 320px;
    margin-left: 10px;    
}

body {
    background-color: #000000;
    color: #d4d4d4;
}