#maincontainer{
width: 910px; /*Width of main container*/
margin: 0 auto; /*Center container on page*/
}

#topsection{
background: #FFFFFF;
height: 120px; /*Height of top section*/
}

#topsection h1{
margin: 0;
padding-top: 15px;
}

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

#contentcolumn{
margin: 0 180px 0 170px; /*Margins for content column. Should be "0 RightColumnWidth 0 LeftColumnWidth*/
background: #FFFFFF;
}

#leftcolumn{
float: left;
width: 170px; /*Width of left column in pixel*/
margin-left: -910px; /*Set margin to that of -(MainContainerWidth)*/
text-align: center;
background: #FFFFFF;
}

#rightcolumn{
float: left;
width: 180px; /*Width of right column*/
margin-left: -180px; /*Set left margin to -(RightColumnWidth)*/
text-align: center;
background: #FFFFFF;
}

#clean3col{
clear: left;
width: 100%;
background: #FFFFFF;
}

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