img1on = new Image();
	img1on.src = "images/nv/nv1_homepage_a.gif";
	img2on = new Image(); 
	img2on.src = "images/nv/nv1_kontakt_a.gif";
	img3on = new Image();
	img3on.src = "images/nv/nv1_english_a.gif";
	img4on = new Image();
	img4on.src = "images/nv/nv2_einleitung_a.gif";
	img5on = new Image();
	img5on.src = "images/nv/nv2_produktinfos_a.gif";
	img6on = new Image();
	img6on.src = "images/nv/nv2_presse_a.gif";
	img7on = new Image();
	img7on.src = "images/nv/nv2_whitepaper_a.gif";
	img8on = new Image();
	img8on.src = "images/nv/nv2_partner_a.gif";
	img9on = new Image();
	img9on.src = "images/nv/nv2_referenzen_a.gif";
	img10on = new Image();
	img10on.src = "images/nv/nv2_impressum_a.gif";
	
	img1off = new Image();
	img1off.src = "images/nv/nv1_homepage_i.gif";
	img2off = new Image(); 
	img2off.src = "images/nv/nv1_kontakt_i.gif";
	img3off = new Image();
	img3off.src = "images/nv/nv1_english_i.gif";
	img4off = new Image();
	img4off.src = "images/nv/nv2_einleitung_i.gif";
	img5off = new Image();
	img5off.src = "images/nv/nv2_produktinfos_i.gif";
	img6off = new Image();
	img6off.src = "images/nv/nv2_presse_i.gif";
	img7off = new Image();
	img7off.src = "images/nv/nv2_whitepaper_i.gif";
	img8off = new Image();
	img8off.src = "images/nv/nv2_partner_i.gif";
	img9off = new Image();
	img9off.src = "images/nv/nv2_referenzen_i.gif";
	img10off = new Image();
	img10off.src = "images/nv/nv2_impressum_i.gif";
	
	
	function imgOn(imgName) {
	   if (document.images) {
	       document[imgName].src = eval(imgName + "on.src");
	        }
	}
	
	function imgOff(imgName) {
	        if (document.images) {
	            document[imgName].src = eval(imgName + "off.src");
	        }
	}