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) {
		contact_home_over = newImage("images/top/contact-home_over.gif");
		contact_over = newImage("images/top/contact-over.gif");
		sitemap_home_over = newImage("images/top/sitemap-home_over.gif");
		sitemap_over = newImage("images/top/sitemap-over.gif");
		home_over = newImage("images/top/home-over.gif");
		santafe_over = newImage("images/menu/santafe-over.gif");
		event_over = newImage("images/menu/event-over.gif");
		kengaku_over = newImage("images/menu/kengaku-over.gif");
		company_over = newImage("images/menu/company-over.gif");
		gazou_santafe_m_over = newImage("images/main/gazou-santafe_m_over.jpg");
		gazou_santafe_m_over007 = newImage("images/main/gazou-santafe_m_over-07.jpg");
		santafe_m_over = newImage("images/main/santafe_m-over.jpg");
		kengaku_m_over = newImage("images/main/kengaku_m-over.jpg");		
		preloadFlag = true;
	}
}