#contentContainer {
    width:908px;
    margin-left:auto;
    margin-right:auto;
    background: url(/element/images/twoColumnBg.gif) top left repeat-y;
}

#primaryContainer{
    padding:23px 0 23px 21px;
    width:612px;
    float: left;
}

#secondaryContainer{
    width: 232px;
    padding:23px 21px;
    float: left;
}