var chap_array = new Array(
    ["39 - The Happiness of the Pianist",'39/01'],

    ["38 - Number 37, Ichinose Kai 3",'38/01'],

    ["37 - Number 37, Ichinose Kai 2",'37/01'],

    ["36 - Number 37, Ichinose Kai",'36/01'],

    ["35 - Number 33 Maruyama Takako",'35/01'],

    ["34 - Number 31 Amamiya Syuhei",'34/01'],

    ["33 - Wendy",'33/00-cover'],

    ["32 - Little Lady Takako-sama",'32/01'],

    ["31 - On Edge",'31/01'],

    ["30 - The Morning of the Contest",'30/01'],

    ["29 - Mozart's Dying Will",'29/01'],

    ["28 - Give It Our All",'28/01'],

    ["27 - Ess Ei Jay Eye Enne Oh",'27/01'],

    ["26 - I've Misunderstood",'26/01'],

    ["25 - Deal 2",'25/00-cover'],

    ["24 - Deal",'24/01'],

    ["23 - Moonlight",'23/01'],

    ["22 - Can't Get Away",'22/01'],

    ["21 - Repeat",'21/01'],

    ["20 - Start the Lesson",'20/01'],

    ["19 - To Play Chopin 3",'19/01'],

    ["18 - To Play Chopin 2",'18/01'],

    ["17 - To Play Chopin",'17/01'],

    ["16 - Kai Meets Chopin",'16/00-cover'],

    ["15 - Classical Music",'15/01'],

    ["14 - An Excellent Teacher",'14/01'],

    ["13 - Mozart",'13/01'],

    ["12 - Little Brown Bottle",'12/01-02'],

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

    ["10 - Ajino Sosuke's Triumph and Downfall",'10/01'],

    ["9 - Forest",'9/01'],

    ["8 - One Bite of Beef",'8/00-cover'],

    ["7 - Ajino Sousuke",'7/01'],

    ["6 - Exciting",'6/01'],

    ["5 - The Hand of a Beast, The Hand of a Pianist",'5/01'],

    ["4 - Witness",'4/01'],

    ["3 - Piano in the Forest 3",'3/01'],

    ["2 - Piano in the Forest 2",'2/01'],

    ["1 - Piano in the Forest 1",'1/00-cover']
);
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]);
    }
}