html, body{ 
 margin:0; 
 padding:0;
 background-color:black;
} 
 
#pagewidth{
width:100%;
height:100%;
background-color:red;
}
 
#header{
 position:relative; 
 height:100px; 
  background-color:#F99090; 
 width:100%;
} 
 
#leftcol{
 width:30%;
 float:left; 
 position:relative; 
 background-color:#86FF00; 
 }
 
#twocols{
 width:69.9999%; /* hack IE */
 float:left; 
 position:relative; 
 background-color:green;
  }
 
#rightcol{
 width:40%; 
 float:right; 
 position:relative; 
 background-color:#3F3FFF;
 }
 
#maincol{background-color: #B02CFF;  
 float: left; 
 display:inline; 
 position: relative; 
 width:60%; 
 }
 
#footer{
 height:30px; 
  background-color:#FF00FF; 
 clear:both;
 }