*{margin:0px;height:0px}
body{background:#408080}

#wrapper{width:1000px;height:800px;margin:10px auto;background:#C0C0C0}
#margin{text-align:center;margin-top:30px}
#test{width:600px;height:400px;display:none;margin-left:200px;margin-top:50px}