.colmask {
position:relative;	/* This fixes the IE7 overflow hidden bug */
clear:both;
float:left;
width:100%;			/* width of whole page */
overflow:hidden;		/* This chops off any overhanging divs */
}

.colright,
.colmid,
.colleft {
float:left;
width: 100%;
position:relative;
}

.col1,
.col2,
.col3 {
float:left;
position:relative;
padding: 0 0 1em 0;	/* no left and right padding on columns, we just make them narrower instead 
only padding top and bottom is included here, make it whatever value you need */
overflow:hidden;
}

.threecol {
		background:#eee;		/* right column background colour */
		border-bottom: 1px #241f3d solid;
	}
	.threecol .colmid {
		right:25%;			/* width of the right column */
		background:#fff;		/* center column background colour */
		border-right: 1px #241f3d solid;
		
	}
	.threecol .colleft {
		right:50%;			/* width of the middle column */
		background:#b3c4e6;/* left column background colour */
		border-right: 1px #241f3d solid;
	}
	.threecol .col1 {
		width:46%;			/* width of center column content (column width minus padding on either side) */
		left:102%;			/* 100% plus left padding of center column */
	}
	.threecol .col2 {
		width:21%;			/* Width of left column content (column width minus padding on either side) */
		left:31%;			/* width of (right column) plus (center column left and right padding) plus (left column left padding) */
	}
	.threecol .col3 {
		width:21%;			/* Width of right column content (column width minus padding on either side) */
		left:85%;			/* Please make note of the brackets here:(100% - left column width) plus (center column left and right padding) plus (left column left and right padding) plus (right column left padding) */
					
	}