var nav11=new Image();
	nav11.src="images/hauptmenu/ueber_uns1.gif";
var nav12=new Image();
	nav12.src="images/hauptmenu/ueber_uns2.gif";
	
var nav21=new Image();
	nav21.src="images/hauptmenu/forschung1.gif";
var nav22=new Image();
	nav22.src="images/hauptmenu/forschung2.gif";
	
var nav31=new Image();
	nav31.src="images/hauptmenu/leistungen1.gif";
var nav32=new Image();
	nav32.src="images/hauptmenu/leistungen2.gif";
	
var nav41=new Image();
	nav41.src="images/hauptmenu/abteilungen1.gif";
var nav42=new Image();
	nav42.src="images/hauptmenu/abteilungen2.gif";
	
var nav51=new Image();
	nav51.src="images/hauptmenu/presse1.gif";
var nav52=new Image();
	nav52.src="images/hauptmenu/presse2.gif";
	
var nav61=new Image();
	nav61.src="images/hauptmenu/termine1.gif";
var nav62=new Image();
	nav62.src="images/hauptmenu/termine2.gif";
	
var nav71=new Image();
	nav71.src="images/hauptmenu/aktuelles1.gif";
var nav72=new Image();
	nav72.src="images/hauptmenu/aktuelles2.gif";
	
var nav81=new Image();
	nav81.src="images/hauptmenu/download1.gif";
var nav82=new Image();
	nav82.src="images/hauptmenu/download2.gif";

var nav91=new Image();
	nav91.src="images/button1.gif";
var nav92=new Image();
	nav92.src="images/button2.gif";