function menulist(cnum) {

	cls = document.getElementById(cnum);

	if(cls.className == "tojiru") {
			cls.className = "hiraku";
			document.images["menuimg_" + cnum].src = "http://www.yukatawasou.jp/design/yukatawasou/images/botanr.jpg";
	} else {
			cls.className = "tojiru";
			document.images["menuimg_" + cnum].src = "http://www.yukatawasou.jp/design/yukatawasou/images/botan.jpg";
	}
}