function div_height(){


	var inhalt = document.getElementById('inhalt').scrollHeight;
	//alert(inhalt);

	
	/* 
	 * Blauer Hintergrund
	 */
	
	//var blue_back = 925;
	//document.getElementById("bottom_blue").style.height = blue_back + "px";
	
	
	
	
	var navi = 60;
	var blue = 225;
	
	
	inhalt = document.getElementById('inhalt').scrollHeight;
	//alert(inhalt);
	var navigation 		= inhalt - navi;
	var backgrounds 	= inhalt - blue;
	//var navigationH = document.getElementById('inhalt').style.height;
	
	//alert(navigationH);
	
	document.getElementById("navigation").style.height 	= navigation + "px";
	document.getElementById("bottom_blue").style.height 	= backgrounds + "px";
}