body {
	background-color:#ADD3F0;
}
.background {
	background: #ADD3F0 url("bilder/hintergrund_m.jpg") no-repeat left top;
	position: absolute;
	left: 50%;
	width: 910px;
	margin-left: -455px; 
	top: 50%;
	height: 550px;
	margin-top: -275px; 
	
}