body{ margin:0; padding:0; font-size:30px; color:#fff}.top{height:100px;background:#ccc;}.main{height:600px;background:red;}.left{height:600px;width:200px;float:left;background:green;}.right{height:600px;width:100%; float:right;background:blue;margin:0 0 0 ?210px;position:absolute;}.foot{height:50px;background:#ddd;}