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) {
		mainNav_01_over = newImage("/images/mainNav_01-over.gif");
		mainNav_02_over = newImage("/images/mainNav_02-over.gif");
		mainNav_03_over = newImage("/images/mainNav_03-over.gif");
		mainNav_04_over = newImage("/images/mainNav_04-over.gif");
		lowNav_01_over = newImage("/images/lowNav/lowNav_01-over.gif");
		lowNav_02_over = newImage("/images/lowNav/lowNav_02-over.gif");
		lowNav_03_over = newImage("/images/lowNav/lowNav_03-over.gif");
		lowNav_04_over = newImage("/images/lowNav/lowNav_04-over.gif");
		lowNav_05_over = newImage("/images/lowNav/lowNav_05-over.gif");
		bottomNav_02_over = newImage("/images/bottomNav_02-over.gif");
		bottomNav_04_over = newImage("/images/bottomNav_04-over.gif");
		bottomNav_05_over = newImage("/images/bottomNav_05-over.gif");
		bottomNav_06_over = newImage("/images/bottomNav_06-over.gif");
		intlNav_01_over = newImage("/images/intlNav_01-over.gif");
		intlNav_02_over = newImage("/images/intlNav_02-over.gif");
		intlNav_03_over = newImage("/images/intlNav_03-over.gif");
		intlNav_04_over = newImage("/images/intlNav_04-over.gif");
		tribeNav_08_over = newImage("/images/tribeNav_08-over.gif");
		desc_on = newImage("/images/buttons/desc_on.gif");
		tech_on = newImage("/images/buttons/tech_on.gif");
		features_on = newImage("/images/buttons/features_on.gif");
		preloadFlag = true;
	}
}