var chap_array = new Array(
    ["23 - A New Method",'23'],

    ["22 - Suspicion",'22'],

    ["21 - Headstart",'21'],

    ["20 - Return",'20'],

    ["19 - Promise",'19'],

    ["18 - Breakdown",'18'],

    ["17 - Conclusion",'17'],

    ["16 - Berserk",'16'],

    ["15 - Disillusion",'15'],

    ["14 - Victim",'14'],

    ["13 - Rendezvous",'13'],

    ["12 - Selection",'12'],

    ["11 - Aya Hime",'11'],

    ["10 - Village Homecoming",'10'],

    ["9 - Koryuu's Disaster",'9'],

    ["8 - An Ordinary Moment",'8'],

    ["7 - Open",'7'],

    ["6 - Volition",'6'],

    ["5 - Warmth",'5'],

    ["4 - Revelation",'4'],

    ["3 - The Successor",'3'],

    ["2 - Memory",'2'],

    ["1 - Red Eyes",'1']
);
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]);
    }
}