var lock=1;
var state=0;
var nr=1;

// init menu images
if (document.images) {
  image1 = new Image;image2 = new Image;image3 = new Image;image4 = new Image;image5 = new Image;image6 = new Image;image7 = new Image;image8 = new Image;image5 = new Image;image9 = new Image;image10 = new Image;image11 = new Image;image12 = new Image;image13 = new Image;image14 = new Image;image15 = new Image;image16 = new Image;

  image1.src = 'images/menu_home_.gif';
  image2.src = 'images/menu_home.gif';
  image3.src = 'images/menu_fotogalerie_.gif';
  image4.src = 'images/menu_fotogalerie.gif';
  image5.src = 'images/menu_ausstattung_.gif';
  image6.src = 'images/menu_ausstattung.gif';  
  image7.src = 'images/menu_sehenswuerdigkeiten_.gif';
  image8.src = 'images/menu_sehenswuerdigkeiten.gif';  
  image9.src = 'images/menu_anfahrt_.gif';
  image10.src = 'images/menu_anfahrt.gif';
  image11.src = 'images/menu_preise_.gif';
  image12.src = 'images/menu_preise.gif'; 
  image13.src = 'images/menu_gaestebuch_.gif';
  image14.src = 'images/menu_gaestebuch.gif'; 
  image15.src = 'images/menu_kontakt_.gif';
  image16.src = 'images/menu_kontakt.gif'; 
}

// check menu state
function menuSet(nr) {
	if (nr!=lock) {
	var oldstate = lock;
	var newstate = nr;
	var oldimg = eval("image"+(2*lock));
	//alert("Neue Nr.:"+nr+" alte Nr.:"+lock+" alte Grafik: "+oldimg.src);
	document.getElementById("m"+lock).src=oldimg.src;

	var newnum = (2*nr)-1;
	var newimg = eval("image"+newnum);
	//alert("Neue Nr.:"+nr+" alte Nr.:"+lock+" neue Grafik Nr.: "+(nr*2)+" Graname: "+newimg.src);
	document.getElementById("m"+nr).src=newimg.src;
	lock=nr;
	}
}