//初期設定///////////////////////////////
	//画像保存先
	var folder = "./img/";

	//先読みする画像の名前
	var p_file = new Array('menu_access','menu_gallery','menu_news','menu_price','menu_staff','menu_voice');

//main///////////////////////////////////
	var img = new Object();
	for (i=0;i<p_file.length;i++){
		img[p_file[i]] = new Image();
		img[p_file[i]+"_ov"] = new Image();
		img[p_file[i]].src = folder + p_file[i] + ".gif";
		img[p_file[i]+"_ov"].src = folder + p_file[i] + "_ov.gif";
	}

	function On(name) {
		document.images[name].src = img[name+"_ov"].src;
	}
	function Off(name) {
		document.images[name].src = img[name].src;
	}