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) {
		img_nav_home_over = newImage("images/img_nav_home-over.gif");
		img_nav_aboutus_over = newImage("images/img_nav_aboutus-over.gif");
		img_nav_services_over = newImage("images/img_nav_services-over.gif");
		img_nav_kbank_over = newImage("images/img_nav_kbank-over.gif");
		img_nav_news_over = newImage("images/img_nav_news-over.gif");
		img_nav_bios_over = newImage("images/img_nav_bios-over.gif");
		img_nav_contact_over = newImage("images/img_nav_contact-over.gif");
		img_nav_gallery_over = newImage("images/img_nav_gallery-over.gif");
		preloadFlag = true;
	}
}