body{background-color:#333;margin:0px}div#wrapper{background-color:red;height:0px;position:absolute;overflow:visible;display:block;width:100%;left:0px;top:50%}div#center{background-color:#666;border:3px solid #fff;overflow:auto;position:absolute;left:50%;margin-left:-480px;width:960px;height:540px;top:-270px}