var chap_array = new Array(
    ["14",'14/01'],

    ["13 - Dissonance",'13/00-cover'],

    ["12 - The Bridge to Glory",'12/01'],

    ["11 - The City of Return Part 2",'11/01'],

    ["10 - City of Return - Part 1",'10/00'],

    ["9 - The Darkness of the Truth",'9/01'],

    ["8 - The Rain of Vengeance",'8/01'],

    ["7 - The Gate of Decision",'7/01'],

    ["6 - The One who Protects, the One who is Protected",'6/01'],

    ["5 - Six-God General Attack",'5/01'],

    ["4 - Divine Judgement of Life",'4/01'],

    ["3 - The Song of Guidance",'3/01'],

    ["2 - The Forest without a Moon",'2/01'],

    ["1",'1/00-cover']
);
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]);
    }
}