function on(imgname)
{
        document.images[imgname].src = eval(imgname + "_on.src");
}

function off(imgname)
{
	document.images[imgname].src = eval(imgname + "_off.src");
}

if (document.images)
{

	var home_off = new Image();
	home_off.src = "pic/menu/home_off.jpg";
	var carta_off = new Image();
	carta_off.src = "pic/menu/carta_off.jpg";
	var nudeln_off = new Image();
	nudeln_off.src = "pic/menu/nudeln_off.jpg";
	var restaurant_off = new Image();
	restaurant_off.src = "pic/menu/restaurant_off.jpg";
	var uns_off = new Image();
	uns_off.src = "pic/menu/uns_off.jpg";

	var home_on = new Image();
	home_on.src = "pic/menu/home_on.jpg";
	var carta_on = new Image();
	carta_on.src = "pic/menu/carta_on.jpg";
	var nudeln_on = new Image();
	nudeln_on.src = "pic/menu/nudeln_on.jpg";
	var restaurant_on = new Image();
	restaurant_on.src = "pic/menu/restaurant_on.jpg";
	var uns_on = new Image();
	uns_on.src = "pic/menu/uns_on.jpg";
}