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) {
		menu_saijyou_over = newImage("images/menu/menu-saijyou_over.jpg");
		menu_sougi_over = newImage("images/menu/menu-sougi_over.jpg");
		menu_annshin_over = newImage("images/menu/menu-annshin_over.jpg");
		menu_qa_over = newImage("images/menu/menu-qa_over.jpg");
		menu_kakaku_over = newImage("images/menu/menu-kakaku_over.jpg");
		saijyou_over = newImage("images/menu/saijyou-over.jpg");
		sougi_over = newImage("images/menu/sougi-over.jpg");
		annshin_over = newImage("images/menu/annshin-over.jpg");
		kakaku_over = newImage("images/menu/kakaku-over.jpg");
		kazoku_over = newImage("images/menu/kazoku-over.jpg");
		qa_over = newImage("images/menu/qa-over.jpg");
		menu_saijyou_over028 = newImage("images/menu/menu-saijyou_over-28.jpg");
		menu_sougi_over030 = newImage("images/menu/menu-sougi_over-30.jpg");
		menu_kakaku_over033 = newImage("images/menu/menu-kakaku_over-33.jpg");
		menu_kazoku_over = newImage("images/menu/menu-kazoku_over.jpg");
		menu_qa_over037 = newImage("images/menu/menu-qa_over-37.jpg");
		preloadFlag = true;
	}
}