function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		index_over = newImage("images/index-over.jpg");
		schedule_events_over = newImage("images/schedule_events-over.jpg");
		hours_over = newImage("images/hours-over.jpg");
		charity_members_over = newImage("images/charity_members-over.jpg");
		volunteer_hours_schedule_over = newImage("images/volunteer_hours_schedule-ov.jpg");
		association_directors_over = newImage("images/association_directors-over.jpg");
		contact_us_over = newImage("images/contact_us-over.jpg");
		location_over = newImage("images/location-over.jpg");
		preloadFlag = true;
	}
}