<html><head>
<style type="text/css">
*{
padding:0;
margin:0}
#menu{
width:240px;
height:400px;
float:left;
background:#fcc}
#content{
height:400px;
margin-left:240px;
background:#cfc}
#col, #jew{
width:240px;
height:240px;
position:relative}
#col{
left:33.3%;
margin-left:-160px}
#jew{
left:66.7%;
margin-left:-160px}
</style>
</head><body>
<div id="menu"></div>
<div id="content">
<img src="i1.jpg" id="col">
<img src="i2.jpg" id="jew">
</div>
</body></html>
Демо.