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("images/home-over.gif");
		Company_over = newImage("images/company-over.gif");
		Company_History_over = newImage("images/company-history-over.gif");
		Technology_over = newImage("images/technology-over.gif");
		Development_over = newImage("images/development-over.gif");
		Research_over = newImage("images/research-over.gif");
		New_Products_over = newImage("images/new-products-over.gif");
		Equipment_over = newImage("images/equipment-over.gif");
		Careers_over = newImage("images/careers-over.gif");
		preloadFlag = true;
	}
}