var chap_array = new Array(
    ["16",'16/01'],

    ["15 - Nightmare 6",'15/01'],

    ["14 - Nightmare 5",'14/00'],

    ["13 - Nightmare 4",'13/01'],

    ["12 - Nightmare Part 3",'12/01'],

    ["11 - Nightmare Part 2",'11/01'],

    ["10 - Nightmare 1",'10/01'],

    ["9 - Atonement",'9/01'],

    ["8 - Mihkail",'8/01'],

    ["7 - Cycle of Rebirth",'7/01'],

    ["6 - Awakening",'6/01'],

    ["5 - Violation",'5/01'],

    ["4 - Kor",'4/01'],

    ["3 - Darkness",'3/01'],

    ["2 - The Seventh District",'2/01'],

    ["1 - Escape",'1/01']
);
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]);
    }
}