if (document.images) {
  		var img_hotel1 = new Image();
 		img_hotel1.src = "images/button/nav1.gif";
		var img_hotel2 = new Image();
 		img_hotel2.src = "images/button/nav12.gif";

  		var img_gastro1 = new Image();
 		img_gastro1.src = "images/button/nav2.gif";
		var img_gastro2 = new Image();
 		img_gastro2.src = "images/button/nav22.gif";
 		
 		var img_incent1 = new Image();
 		img_incent1.src = "images/button/nav3.gif";
		var img_incent2 = new Image();
 		img_incent2.src = "images/button/nav32.gif";
 		
 		var img_tag1 = new Image();
 		img_tag1.src = "images/button/nav4.gif";
		var img_tag2 = new Image();
 		img_tag2.src = "images/button/nav42.gif";
 		
 		var img_angebot1 = new Image();
 		img_angebot1.src = "images/button/nav5.gif";
		var img_angebot2 = new Image();
 		img_angebot2.src = "images/button/nav52.gif";
 		
 		var img_buchung1 = new Image();
 		img_buchung1.src = "images/button/nav6.gif";
		var img_buchung2 = new Image();
 		img_buchung2.src = "images/button/nav62.gif";
 		
 		var img_kontakt1 = new Image();
 		img_kontakt1.src = "images/button/nav7.gif";
		var img_kontakt2 = new Image();
 		img_kontakt2.src = "images/button/nav72.gif";
 		
 		var img_home1 = new Image();
 		img_home1.src = "images/button/nav8.gif";
		var img_home2 = new Image();
 		img_home2.src = "images/button/nav82.gif";
 		
		}
		function hotel1() {
		if (document.images)
		document.images["hotel"].src = "images/button/nav1.gif";
		}
		function hotel2() {
		if (document.images)
		document.images["hotel"].src = "images/button/nav12.gif";
		}

		function gastro1() {
		if (document.images)
		document.images["gastro"].src = "images/button/nav2.gif";
		}
		function gastro2() {
		if (document.images)
		document.images["gastro"].src = "images/button/nav22.gif";
		}
		
		function incent1() {
		if (document.images)
		document.images["incent"].src = "images/button/nav3.gif";
		}
		function incent2() {
		if (document.images)
		document.images["incent"].src = "images/button/nav32.gif";
		}
		
		function tag1() {
		if (document.images)
		document.images["tag"].src = "images/button/nav4.gif";
		}
		function tag2() {
		if (document.images)
		document.images["tag"].src = "images/button/nav42.gif";
		}
		
		function angebot1() {
		if (document.images)
		document.images["angebot"].src = "images/button/nav5.gif";
		}
		function angebot2() {
		if (document.images)
		document.images["angebot"].src = "images/button/nav52.gif";
		}
		
		function buchung1() {
		if (document.images)
		document.images["buchung"].src = "images/button/nav6.gif";
		}
		function buchung2() {
		if (document.images)
		document.images["buchung"].src = "images/button/nav62.gif";
		}
		
		function kontakt1() {
		if (document.images)
		document.images["kontakt"].src = "images/button/nav7.gif";
		}
		function kontakt2() {
		if (document.images)
		document.images["kontakt"].src = "images/button/nav72.gif";
		}
		
		function home1() {
		if (document.images)
		document.images["home"].src = "images/button/nav8.gif";
		}
		function home2() {
		if (document.images)
		document.images["home"].src = "images/button/nav82.gif";
		}