var chap_array = new Array(
    ["16 - Master Swordsmith Ryotsu!",'16'],

    ["15 - Nakagawa Corp in Tokyo!",'15'],

    ["14 - Legend of the Golden Fishes - Part 2",'14'],

    ["13 - Legend of the Golden Fishes - Part 1",'13'],

    ["12 - Hurry for Convenience!",'12'],

    ["11 - The Doll Collecting Club",'11'],

    ["10 - Capturing the Store Thief",'10'],

    ["9 - Hawaii Paradise Part 2",'9'],

    ["8 - Hawaii Paradise",'8'],

    ["7 - Good Medicine Tastes Bad",'7'],

    ["6 - Professional Wrestlers",'6'],

    ["5 - Founding of Happism",'5'],

    ["4 - Back to the Ancient Times",'4'],

    ["3 - A Visitor from Above!",'3'],

    ["2 - The Golf Hustlers Strikes Again",'2'],

    ["1 - Assualt on Modern Ancient Antiques!",'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]);
    }
}