var chap_array = new Array(
    ["23 - The Rice is Peach-colored Part 2",'23'],

    ["22 - The Rice is Peach-colored Part 1",'22'],

    ["21 - Blood-stained with Desperation! Poem Showdown",'21'],

    ["20 - Porgy of July",'20'],

    ["19 - Don't Worry It's All a Dream in the End",'19'],

    ["18",'18'],

    ["17 - Race Yureko's Towel Heart",'17'],

    ["16 - Everyone is Nice",'16'],

    ["15 - Flute Lesson 1, 2, 3",'15'],

    ["14 - My Very Own Scorpan X",'14'],

    ["13 - Say You Don't Care What Happens",'13'],

    ["12 - Broken Billy",'12'],

    ["11 - Hip Hop is Hard de Gozaru no Maki",'11'],

    ["10 - Garikuson's Secret Lecturer",'10'],

    ["9 - For Use with Rubber",'9'],

    ["8 - Bone Fracture Prima Donna",'8'],

    ["7 - Secret Dorm Gari no Ana",'7'],

    ["6 - He Tried His Best, Piyohiko Did",'6'],

    ["5 - The Will-Power of Maniacs",'5'],

    ["4 - Things that Cannot be Transferred",'4'],

    ["3 - Can You Understand",'3'],

    ["2 - Randomly Worried About Jaguar",'2'],

    ["1 - Somehow Worried About Jaguar",'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]);
    }
}