if (document.images) {
  		var img_nav1 = new Image();
 		img_nav1.src = "images/navi/leistungen01.jpg";
		var img_nav12 = new Image();
 		img_nav12.src = "images/navi/leistungen02.jpg";

  		var img_nav2 = new Image();
 		img_nav2.src = "images/navi/portfolio01.jpg";
		var img_nav22 = new Image();
 		img_nav22.src = "images/navi/portfolio02.jpg";
 		
 		var img_nav3 = new Image();
 		img_nav3.src = "images/navi/referenzen01.jpg";
		var img_nav32 = new Image();
 		img_nav32.src = "images/navi/referenzen02.jpg";
 		
 		var img_nav4 = new Image();
 		img_nav4.src = "images/navi/kontakt01.jpg";
		var img_nav42 = new Image();
 		img_nav42.src = "images/navi/kontakt02.jpg";
 		
 		var img_nav5 = new Image();
 		img_nav5.src = "images/navi/impressum01.jpg";
		var img_nav52 = new Image();
 		img_nav52.src = "images/navi/impressum02.jpg";
 		
 		var img_nav6 = new Image();
 		img_nav6.src = "images/navi/gaestebuch01.jpg";
		var img_nav62 = new Image();
 		img_nav62.src = "images/navi/gaestebuch02.jpg";
		
		}
		function nav1() {
		if (document.images)
		document.images["nav01"].src = "images/navi/leistungen01.jpg";
		}
		function nav12() {
		if (document.images)
		document.images["nav01"].src = "images/navi/leistungen02.jpg";
		}

		function nav2() {
		if (document.images)
		document.images["nav02"].src = "images/navi/portfolio01.jpg";
		}
		function nav22() {
		if (document.images)
		document.images["nav02"].src = "images/navi/portfolio02.jpg";
		}
		
		function nav3() {
		if (document.images)
		document.images["nav03"].src = "images/navi/referenzen01.jpg";
		}
		function nav32() {
		if (document.images)
		document.images["nav03"].src = "images/navi/referenzen02.jpg";
		}
		
		function nav4() {
		if (document.images)
		document.images["nav04"].src = "images/navi/kontakt01.jpg";
		}
		function nav42() {
		if (document.images)
		document.images["nav04"].src = "images/navi/kontakt02.jpg";
		}
		
		function nav5() {
		if (document.images)
		document.images["nav05"].src = "images/navi/impressum01.jpg";
		}
		function nav52() {
		if (document.images)
		document.images["nav05"].src = "images/navi/impressum02.jpg";
		}
		
		function nav6() {
		if (document.images)
		document.images["nav06"].src = "images/navi/gaestebuch01.jpg";
		}
		function nav62() {
		if (document.images)
		document.images["nav06"].src = "images/navi/gaestebuch02.jpg";
		}