body, html { 
height: 100%;
width: 100%;
margin:0;
padding:0;
overflow:hidden;
position: relative;
}

#bgimg { 
position:fixed;
	top:-50%;
	left:-50%;
	width:200%;
	height:200%;
	text-align:center;
z-index:1; }

#bgimg img{
position:absolute;
	top:0;
	left:0;
	right:0;
	bottom:0;
	margin:auto;/*rŸckt es in die mitte*/
	min-width:50%;
	min-height:50%;
}
#scrollbar {position:absolute; width:100%; height:100%; top:0; left:0;
overflow:auto; z-index:2;}



#content{
position:relative;
width:600px;
margin:0 auto;
border:1px solid #fff;
color:#000;
padding:10px;
z-index:10;
}
p{margin-top:5px;}
.codeclass{
width:80%
margin-left:10%;
background:#fff;
padding:5px;
border-bottom:1px solid#ccc;
}