body,html {
	margin:0;
	padding:0;
	background:url(wallpaper.jpg);
	background-attachment: fixed;
	background-position: center center;
}
#web{
	position:absolute;
	left:50%;
	top:50%;
	height:565px;
	margin-top:-282.5px;
	width:946px;
	margin-left:-473px;
}