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) {
		homeButton_over = newImage("images/homeButton-over.gif");
		aboutButton_over = newImage("images/aboutButton-over.gif");
		productsServicesButton_over = newImage("images/productsServicesButton-over.gif");
		theProcessButton_over = newImage("images/theProcessButton-over.gif");
		contactUsButton_over = newImage("images/contactUsButton-over.gif");
		preloadFlag = true;
	}
}