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) {
		vibration_over = newImage("images/menu-images/vibration-over.gif");
		oil_over = newImage("images/menu-images/oil-over.gif");
		fluid_over = newImage("images/menu-images/fluid-over.gif");
		indicators_over = newImage("images/menu-images/indicators-over.gif");
		ignition_over = newImage("images/menu-images/ignition-over.gif");
		temperature_over = newImage("images/menu-images/temperature-over.gif");
		prox_pos_over = newImage("images/menu-images/prox-pos-over.gif");
		displacement_over = newImage("images/menu-images/displacement-over.gif");
		pressure_over = newImage("images/menu-images/pressure-over.gif");
		speed_over = newImage("images/menu-images/speed-over.gif");
		optical_over = newImage("images/menu-images/optical-over.gif");
		controllers_over = newImage("images/menu-images/controllers-over.gif");
		support_over = newImage("images/menu-images/support-over.gif");
		pricelist_over = newImage("images/menu-images/pricelist-over.gif");
		links_over = newImage("images/menu-images/links-over.gif");
		contact_over = newImage("images/menu-images/contact-over.gif");
		site_map_over = newImage("images/menu-images/site-map-over.gif");
		download_over = newImage("images/menu-images/download-over.gif");
		home_over = newImage("images/menu-images/home-over.gif");
		preloadFlag = true;
	}
}