html, body {padding:0;margin:0;	background-color: #000;	background-position: center;height: 100%; }
#main{width:100%;height:100%;position:absolute;z-index:2;top:0;left:0}
#content{height:0;font-size:0;line-height:0;position:absolute;z-index:1;bottom:0;left:0}