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) {
		nav_services_over = newImage("/files/nav_services-over.gif");
		nav_testimonials_over = newImage("/files/nav_testimonials-over.gif");
		nav_contact_over = newImage("/files/nav_contact-over.gif");
		nav_generalLandscaping_over = newImage("/files/nav_generalLandscaping-over.gif");
		nav_seasonFlowers_over = newImage("/files/nav_seasonFlowers-over.gif");
		nav_poolscapes_over = newImage("/files/nav_poolscapes-over.gif");
		nav_masonry_over = newImage("/files/nav_masonry-over.gif");
		nav_sports_over = newImage("/files/nav_sports-over.gif");
		preloadFlag = true;
	}
}