nav1 = new Image(); 
	nav1.src = "pics/common/nav_startseite.gif"; 
	nav1_a = new Image(); 
	nav1_a.src = "pics/common/nav_startseite_a.gif";
	
	nav2 = new Image(); 
	nav2.src = "pics/common/nav_ueber_uns.gif"; 
	nav2_a = new Image(); 
	nav2_a.src = "pics/common/nav_ueber_uns_a.gif";
	
	nav3 = new Image(); 
	nav3.src = "pics/common/nav_leistungen.gif"; 
	nav3_a = new Image(); 
	nav3_a.src = "pics/common/nav_leistungen_a.gif";
	
	nav4 = new Image(); 
	nav4.src = "pics/common/nav_referenzen.gif"; 
	nav4_a = new Image(); 
	nav4_a.src = "pics/common/nav_referenzen_a.gif";
	
	nav5 = new Image(); 
	nav5.src = "pics/common/nav_kontakt.gif"; 
	nav5_a = new Image(); 
	nav5_a.src = "pics/common/nav_kontakt_a.gif";
	
	
	
	function Bildwechsel(Bildname,Bildobjekt) {
		window.document.images[Bildname].src = Bildobjekt.src;
	}
	
	var stay = 0;
	
	function showNav(id) {
		if($.browser.msie){
			$(".unternav").hide();
		} else {
			$(".unternav").fadeOut("slow");
		}
		if($.browser.msie){
			$("#un-"+id).show();
		} else {
			$("#un-"+id).fadeIn("slow");
		}
	}
	
	function stayNav() {
		stay = 1;
	}
	
	function hideNav() {
		stay = 0;
		setTimeout("hideNav2()", 1500);
	}
	
	function hideNav2() {
		if (stay == 0) {
			if($.browser.msie){
				$(".unternav").hide();
			} else {
				$(".unternav").fadeOut("slow");
			}
		}
	}
	
	function hideNavFast() {
		$(".unternav").fadeOut("slow");
	}
	
	function bildertausch(bild) {
		$(".grossbild").load("ajax_bild.inc.php?bild="+bild);
	}