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) {
		home_over = newImage("/graphics/buttons/home-over.gif");
		calculator_over = newImage("/graphics/buttons/calculator-over.gif");
		contact_over = newImage("/graphics/buttons/contact-over.gif");
		links_over = newImage("/graphics/buttons/links-over.gif");
		links_over = newImage("/graphics/previouspage-over.gif");
		links_over = newImage("/graphics/newsearch-over.gif");
		links_over = newImage("/graphics/inforequest-over.gif");
		preloadFlag = true;
	}
}