html, body {height: 100%; margin: 0; padding: 0; } div#rand { visibility: hidden; width: 100%; height: 50%; margin-top: -280px; float: left; } div#centerBox { background: white; width: 780px; height: 560px; clear: both; margin: 0px auto 0px auto; position: relative; top: -280px; position: static; }