#wrap{
	position:absolute;
	top:0;
	left:0;
	background: #ffffff no-repeat center top;
	width:100%;
	height:100%;
	padding:0;
	margin:0;
}

#content {
	width: 900px;
	height: 500px;
	margin-top: 20px;
	margin-left: auto;
	margin-right: auto;
}

#praesentation {
	width: 900px;
	height: 600px;
	margin-left: auto;
	margin-right: auto;
	margin-top: 20px;
}

#menu {
	width: 100%;
	height: 80px;
	border-bottom: 1px solid #cccccc;
}