var chap_array = new Array(
    ["29 - Friend",'29'],

    ["28 - Run",'28'],

    ["27 - Awake",'27'],

    ["26 - Strength",'26'],

    ["25 - Scream",'25'],

    ["24 - Fate",'24'],

    ["23 - Immortal",'23'],

    ["22 - Doll",'22'],

    ["21 - Freedom",'21'],

    ["20 - Change",'20'],

    ["19 - Next",'19'],

    ["18 - Companion",'18'],

    ["17 - Confess",'17'],

    ["16 - Vexation",'16'],

    ["15 - Cobra",'15'],

    ["14 - Fishing",'14'],

    ["13 - Boat",'13'],

    ["12 - Sword",'12'],

    ["11 - Pride",'11'],

    ["10 - Shut",'10'],

    ["9 - Block",'9'],

    ["8 - Glasses",'8'],

    ["7 - Weakness",'7'],

    ["6 - Honey",'6'],

    ["5 - Dog",'5'],

    ["4 - Flower",'4'],

    ["3 - Ready",'3'],

    ["2 - Back",'2'],

    ["1 - Promise",'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]);
    }
}