#navigation {
 position:absolute;
 
}
#inhalt {
	position:absolute;
	width:500px;
	height:470px;
	z-index:1;
	top: 70px;
	left: -10px;
	overflow: visible;
}

#inhalt_b {
	position:absolute;
	width:740px;
	height:520px;
	z-index:2;
	top: 70px;
	left: -10px;
	overflow: visible;
	}

#inhalt_c {
	position:absolute;
	width:740px;
	height:540px;
	z-index:3;
	top: 70px;
	left: -10px;
	overflow: visible;
}