var aku_on = new Image();
aku_on.src = "img/navi/aku_on.gif";
var aku_off = new Image();
aku_off.src = "img/navi/aku_off.gif";

var meso_on = new Image();
meso_on.src = "img/navi/meso_on.gif";
var meso_off = new Image();
meso_off.src = "img/navi/meso_off.gif";

var haus_on = new Image();
haus_on.src = "img/navi/haus_on.gif";
var haus_off = new Image();
haus_off.src = "img/navi/haus_off.gif";

var natur_on = new Image();
natur_on.src = "img/navi/natur_on.gif";
var natur_off = new Image();
natur_off.src = "img/navi/natur_off.gif";

var hypno_on = new Image();
hypno_on.src = "img/navi/hypno_on.gif";
var hypno_off = new Image();
hypno_off.src = "img/navi/hypno_off.gif";

var chiro_on = new Image();
chiro_on.src = "img/navi/chiro_on.gif";
var chiro_off = new Image();
chiro_off.src = "img/navi/chiro_off.gif";

var reise_on = new Image();
reise_on.src = "img/navi/reise_on.gif";
var reise_off = new Image();
reise_off.src = "img/navi/reise_off.gif";