if (document.images) {
homeon = new Image();
homeon.src = "graphics/home_on.gif";
scheduleon = new Image();
scheduleon.src = "graphics/schedule_on.gif";
presson = new Image();
presson.src = "graphics/press_on.gif";
creditson = new Image();
creditson.src = "graphics/credits_on.gif";
homeoff = new Image();
homeoff.src = "graphics/home_off.gif";
scheduleoff = new Image();
scheduleoff.src = "graphics/schedule_off.gif";
pressoff = new Image();
pressoff.src = "graphics/press_off.gif";
creditsoff = new Image();
creditsoff.src = "graphics/credits_off.gif";

	function picon(picname) {
		scotton = eval(picname + "on.src");
		document [picname].src = scotton;
		}
		
	function picoff(picname) {
		scottoff = eval(picname + "off.src");
		document [picname].src = scottoff;
		}
	}