#topsection{
height: 90px; /*Height of top section*/
}

#contentwrapper{
float: left;
width: 100%;
}

#contentcolumn{
margin-right: 10px; /*Set right margin to RightColumnWidth*/
}

#footer{
clear: left;
width: 100%;
text-align: center;
padding: 4px 0;
}

.innertube{
margin: 10px; /*Margins for inner DIV inside each column (to provide padding)*/
margin-top: 0;
}