var chap_array = new Array(
    ["Extra 2 - Digimortal Part Two",'12.2/01'],

    ["Extra 1 - Digimortal Part One",'12.1/01'],

    ["11 - Propagation",'11/01'],

    ["10 - Denji Kudo",'10/01'],

    ["9 - The Forbidden Cage",'9/01'],

    ["8 - The Hungry Gauna",'8/01'],

    ["7 - 4th Chronicle",'7/00-cover'],

    ["6 - Destruction Notice",'6/01'],

    ["5 - Gousa Mausoleum",'5/01'],

    ["4 - Manifestation Chain",'4/01'],

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

    ["2 - Nayuta",'2/01'],

    ["1 - White Gauna",'1/01-02']
);
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]);
    }
}