function buttonHovers(img) {
				$$("img").each(function(g) {
					if (g.readAttribute("src").split("_off")[0] == img) {
						var file = g.readAttribute("src").split("_off");
						g.observe("mouseover", function() {
							this.writeAttribute({
								src: file[0] + "_on" + file[1]
							})
						});
						g.observe("mouseout", function() {
							this.writeAttribute({
								src: file[0] + "_off" + file[1]
							})
						});
					}
				});
			}
			
			function setButtonHovers() {
				buttons.each(function(b) {
					buttonHovers(b);
				});
			}