body {
	background-color:#000000;
}

#horizont        
	{
	text-align: center;
	position: absolute;
	top: 50%;
	left: 0px;
	width: 100%;
	height: 1px;
	overflow: visible;
	visibility: visible;
	display: block
	}


.seite{
	position: absolute;
	left: 50%;
	top: -200px;
	width:640px;
	height:400px;
	margin-left: -320px;
}