var chap_array = new Array(
    ["23 - Keikain Onmyoujutsu",'23/01'],

    ["22 - Demon of the Wind",'22/01'],

    ["21",'21/01'],

    ["20 - Kana's Birthday",'20/01'],

    ["19 - Kana and the Youkai Ungaikyou",'19/01'],

    ["18",'18/01'],

    ["17 - Gyuuki's Beloved Nura Clan",'17/01'],

    ["16 - Umewakamaru and Gyuuki",'16/01'],

    ["15 - Rikuo Faces Gyuuki",'15/01'],

    ["14 - Rikuo Stands at the Peak of Mt. Nejireme",'14/01'],

    ["13 - Rikuo on the Night of the New Moon",'13/01'],

    ["12 - Rikuo Goes Out on a Night Exploration",'12/01'],

    ["11 - Rikuo, Sojourn on Mt. Nejireme",'11/01'],

    ["10 - Rikuo Goes on a Youkai Mystery Tour",'10/01'],

    ["9 - Rikuo has a Fever",'9/01'],

    ["8 - Rikuo Faces Off Against the Fangs of Kyuuso",'8/01'],

    ["7 - Rikuo Goes to 1st Street",'7/01'],

    ["6 - Rikuo's Home is Explored",'6/01'],

    ["5 - Rikuo, Present at the Formation of the Kiyo Cross Squad",'5/01'],

    ["4 - Rikuo Had a Dream",'4/01'],

    ["3 - Rikuo, Angered by the Sworn Brother",'3/01'],

    ["2 - Rikuo, Walking the School at Night",'2/01'],

    ["1 - Becoming the Master of All Spirits",'1/01'],

    ["0 - Original One-shot - The Grandchild of Nurarihyon",'0/001']
);
for (var i=0; i<chap_array.length; i++) {
    document.getElementById('id_chapter_1').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    if (document.getElementById('id_chapter_2')) {
        document.getElementById('id_chapter_2').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
    }
}