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_home_over = newImage("image/nav-home-over.gif");
		nav_about_over = newImage("image/nav-about-over.gif");
		nav_contact_over = newImage("image/nav-contact-over.gif");
		nav_oursod_over = newImage("image/nav-oursod-over.gif");
		nav_installation_over = newImage("image/nav-installation-over.gif");
		nav_photogallery_over = newImage("image/nav-photogallery-over.gif");
		nav_photogallery_over019 = newImage("image/nav-photogallery-over-19.gif");
		nav_benefits_over = newImage("image/nav-benefits-over.gif");
		nav_benefits_over022 = newImage("image/nav-benefits-over-22.gif");
		nav_homeowners_over = newImage("image/nav-homeowners-over.gif");
		nav_homeowners_over025 = newImage("image/nav-homeowners-over-25.gif");
		nav_landscapers_over = newImage("image/nav-landscapers-over.gif");
		ui_nav_additionalinfo_2 = newImage("image/ui-nav-additionalinfo_2.gif");
		preloadFlag = true;
	}
}