body 
{
    background-color: #0000cc;
    color:#000;
    margin: 0px;
}
#banner 
{
    background-color:#00cc00;
    color:#000;
    padding:20px;
    border: solid 1px #000;
}

#leftColumn 
{
    float:left;
    width:100px;
    background-color:#fff;
    color:#000;
    border: solid 1px #000;
    padding-left: 20px;
    padding-right:20px;
    padding-bottom:300px;
    
}

#mainContent 
{
    background-color: #ccc;
    color:#000;
    border: solid 1px #000;
    padding-left: 20px;
    
}