Janela de Divulgação que fecha,já colado na tela

<br /> <style type="text/css"> <!-- #popjan {border: 0px solid #000000; background-color: #000000; width: 50px; top: 280px;left: 700px; text-align: center; z-index: 50;position:fixed;visibility: visible;} --> </style><br /> <div id="popjan"><a style="float:right" href="#" onclick="document.getElementById('popjan').style.display='none';">[Fechar]</a><br /> <div style="clear:both"></div><div style="width:100px; text-align:center; margin:auto"><div style="float:right; width:100px">COLOQUE AQUI O CONTEÚDO<br /> </div><div style="float:right; width:100px"></div><div style="float:right; width:100px"></div></div></div>