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) {
		aboutUs_over = newImage("images/aboutUs-over.jpg");
		services_over = newImage("images/services-over.jpg");
		team_over = newImage("images/team-over.jpg");
		news_over = newImage("images/news-over.jpg");
		prize_over = newImage("images/prize-over.jpg");
		resources_over = newImage("images/resources-over.jpg");
		contactUs_over = newImage("images/contactUs-over.jpg");
		preloadFlag = true;
	}
}