var chap_array = new Array(
    ["Special - Kiriya at 13",'58.1/01'],

    ["57 - Volume 10 Chapter 57 END",'57/01'],

    ["56 - Volume 10 Chapter 56",'56/01'],

    ["55 - Volume 10 Chapter 55",'55/01'],

    ["54 - Volume 10 Chapter 54",'54/01'],

    ["53 - Volume 9 Chapter 53",'53/01'],

    ["52 - Volume 9 Chapter 52",'52/01'],

    ["51 - Volume 9 Chapter 51",'51/01'],

    ["50 - Volume 9 Chapter 50",'50/01'],

    ["49 - Volume 9 Chapter 49",'49/01'],

    ["48 - Volume 9 Chapter 48",'48/01-02'],

    ["47 - Volume 8 Chapter 47",'47/01'],

    ["46 - Volume 8 Chapter 46",'46/01'],

    ["45 - Volume 8 Chapter 45",'45/01'],

    ["44 - Volume 8 Chapter 44",'44/01'],

    ["43 - Volume 8 Chapter 43",'43/01'],

    ["42 - Volume 8 Chapter 42",'42/01-02'],

    ["41 - Volume 7 Chapter 41",'41/01'],

    ["40 - Volume 7 Chapter 40",'40/01'],

    ["39 - Volume 7 Chapter 39",'39/01'],

    ["38 - Volume 7 Chapter 38",'38/01'],

    ["37 - Volume 7 Chapter 37",'37/01'],

    ["36 - Volume 7 Chapter 36",'36/01-02'],

    ["35 - Volume 6 Chapter 35",'35/01'],

    ["34 - Volume 6 Chapter 34",'34/01'],

    ["33 - Volume 6 Chapter 33",'33/01'],

    ["32 - Volume 6 Chapter 32",'32/01'],

    ["31 - Volume 6 Chapter 31",'31/01'],

    ["30 - Volume 6 Chapter 30",'30/01-02'],

    ["29 - Volume 5 Chapter 29",'29/01'],

    ["28 - Volume 5 Chapter 28",'28/01'],

    ["27 - Volume 5 Chapter 27",'27/01'],

    ["26 - Volume 5 Chapter 26",'26/01'],

    ["25 - Volume 5 Chapter 25",'25/01'],

    ["24 - Volume 5 Chapter 24",'24/01-02'],

    ["23 - Volume 4 Chapter 23",'23/01'],

    ["22 - Volume 4 Chapter 22",'22/01'],

    ["21 - Volume 4 Chapter 21",'21/01'],

    ["20 - Volume 4 Chapter 20",'20/01'],

    ["19 - Volume 4 Chapter 19",'19/01'],

    ["18 - Volume 4 Chapter 18",'18/00-cover'],

    ["17 - Volume 3 Chapter 17",'17/01'],

    ["16 - Volume 3 Chapter 16",'16/01'],

    ["15 - Volume 3 Chapter 15",'15/01'],

    ["14 - Volume 3 Chapter 14",'14/01'],

    ["13 - Volume 3 Chapter 13",'13/01'],

    ["12 - Volume 3 Chapter 12",'12/00-cover'],

    ["11 - Volume 2 Chapter 11",'11/01'],

    ["10 - Volume 2 Chapter 10",'10/01'],

    ["9 - Volume 2 Chapter 9",'9/01'],

    ["8 - Volume 2 Chapter 8",'8/01'],

    ["7 - Volume 2 Chapter 7",'7/01'],

    ["6 - Volume 2 Chapter 6",'6/01'],

    ["5 - Volume 1 Chapter 5",'5/01'],

    ["4 - Volume 1 Chapter 4",'4/01'],

    ["3 - Volume 1 Chapter 3",'3/01'],

    ["2 - Volume 1 Chapter 2",'2/01'],

    ["1 - Volume 1 Chapter 1",'1/01']
);
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]);
    }
}