var chap_array = new Array(
    ["19 - That Night, Beneath the Moonlight",'19'],

    ["18 - To Shijem Serpa",'18'],

    ["17 - Samedi",'17'],

    ["16 - The Dejected Athos",'16'],

    ["15 - Leader of the Faction",'15'],

    ["14 - The Man on a Mission",'14'],

    ["13 - The Witches of Seven Days",'13'],

    ["12 - The Other Cross",'12'],

    ["11 - Those Who Begin to Act",'11'],

    ["10 - The Masked Man",'10'],

    ["9 - The Man with the Leaf",'9'],

    ["8 - The Enormous Man",'8'],

    ["7 - The Men with a Choice",'7'],

    ["6 - The Twins",'6'],

    ["5 - The Neat Freak",'5'],

    ["4 - Surprise Assualt",'4'],

    ["3 - The Man With the Foul Mouth",'3'],

    ["2",'2'],

    ["1 - The Man Who Lurks Underground",'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]);
    }
}