#main {
float:
left;
height:
100%;
width:
100%;
}
#main #body {
background:
#ffe6b8 none repeat scroll 0 0;
height:
100%;
margin:
0 210px;
}
#left, #right {
background:
#a0b3d6 none repeat scroll 0 0;
float:
left;
height:
100%;
width:
200px;
}
#left {
margin-left:
-100%;
}
#right {
margin-left:
-200px;
}
<div id="main">
<div id="body"></div></div>
<div id="left"></div>
<div id="right"></div>