function on(menu)
{	eval("document.image_" + menu).src = box_2.src;}function off(menu) 
{	eval("document.image_" + menu).src = box_1.src;}
var box_1 = new Image();box_1.src = "../GRAFIK/box-1.gif";
var box_2 = new Image();box_2.src = "../GRAFIK/box-2.gif";