var chap_array = new Array(
    ["19 - Hindrances",'19'],

    ["18 - Those Who Ask for Love",'18'],

    ["17 - Fleeing the Capital",'17'],

    ["16 - Ghost Tale",'16'],

    ["15 - Duel",'15'],

    ["14 - Desired Forgetfulness",'14'],

    ["13 - Rain and Tears",'13'],

    ["12 - Awakening",'12'],

    ["11 - Hypnosis",'11'],

    ["10 - Spare Key",'10'],

    ["9 - Spirited Away",'9'],

    ["8 - Prize Money Chase",'8'],

    ["7 - Blooming",'7'],

    ["6 - Blindfolded",'6'],

    ["5 - Betrayal",'5'],

    ["4 - Crown of Tears",'4'],

    ["3 - Dream of a Flower",'3'],

    ["2 - Crime and Punishment",'2'],

    ["1 - Hikaru-Kimi The Shining Prince",'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]);
    }
}