function newImage(arg) {
	if (document.images) {
		result = new Image();
		result.src = arg;
		return result;
	}
}

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) {
		logo_bottom_over = newImage("images/logo-bottom-over.gif");
		menu_about_us_over = newImage("images/menu-about-us-over.gif");
		menu_paling_over = newImage("images/menu-paling-over.gif");
		menu_feature_over = newImage("images/menu-feature-over.gif");
		menu_gallery_over = newImage("images/menu-gallery-over.gif");
		menu_side_projects_over = newImage("images/menu-side-projects-over.gif");
		menu_contact_over = newImage("images/menu-contact-over.gif");		
		icon_home_over = newImage("images/icon-home-over.gif");
		icon_info_over = newImage("images/icon-info-over.gif");
		icon_email_over = newImage("images/icon-email-over.gif");
		preloadFlag = true;
	}
}