.colmask {
/* This fixes the IE7 overflow hidden bug and stops the layout jumping out of place */
   position:relative;	 
   clear:both;
   float:left;
/* width of whole page */
   width:100%;		
/* This chops off any overhanging divs */
   overflow:hidden;	
   padding:0 0 20px;
   padding:0 10px;
   padding:0;
}
/* 2 column right menu settings */
.rightmenu {
   background:green;
   background:none;
}
.rightmenu .colleft {
   float:left;
   width:200%;
   margin-left:-200px;
   margin-left:-390px;
   position:relative;
   right:100%;
   background: #ffffff;
   background:red;
   background:none;
}
.rightmenu .col1wrap {
   float:left;
   width:50%;
   position:relative;
   left:50%;
   padding-bottom:0;
}
.rightmenu .col1 {
   margin:0 15px 0 215px;
   margin:0 10px 0 390px;
   overflow:hidden;
   background: yellow;
   background:none;
   min-height:400px;
}
.rightmenu .col2 {
   float:right;
   width:170px;
   width:390px;
   position:relative;
   left:185px;
   left:390px;
   background: #ffffff;
   background: yellow;
   background: none;
   min-height:400px;
}