var changing_img_url=[
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html",
		"http://www.nationaltheater.jp/classes/index.html"
		];