#contentbox #mainleft
{
    clear: both;
    float: left;
    width: 277px;
    padding: 0px;
    margin-top: 0px;
    margin-right: 20px;
}

#contentbox #mainright
{

    float: right;
    width: 277px;
    margin-top: 0px;
    padding: 0px;
}