body{height:100%;margin:0;padding:0;background:url(/images/map-background.jpg) no-repeat center center fixed;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover}.centerlogo{position:absolute;width:200px;height:200px;top:50%;left:50%;margin-left:-100px;margin-top:-100px}