var chap_array = new Array(
    ["48",'48/01'],

    ["47",'47/01'],

    ["46",'46/00-cover'],

    ["45",'45/01'],

    ["44",'44/01'],

    ["43",'43/00'],

    ["42",'42/01'],

    ["41",'41/00-cover'],

    ["40",'40/01'],

    ["39",'39/01'],

    ["38",'38/01'],

    ["37",'37/00-cover'],

    ["36",'36/01'],

    ["35",'35/001'],

    ["34",'34/01'],

    ["33",'33/00'],

    ["32",'32/01'],

    ["31",'31/01'],

    ["30",'30/00'],

    ["29",'29/00-credits'],

    ["28",'28/00'],

    ["27",'27/01'],

    ["26",'26/01'],

    ["25",'25/01'],

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

    ["23",'23/00'],

    ["22",'22/01'],

    ["21",'21/00'],

    ["20",'20/01'],

    ["19",'19/01'],

    ["18",'18/01'],

    ["17",'17/00'],

    ["16",'16/00'],

    ["15",'15/01'],

    ["14",'14/00'],

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

    ["12",'12/00'],

    ["11",'11/00'],

    ["10",'10/01'],

    ["9",'9/00'],

    ["8",'8/01'],

    ["7",'7/01'],

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

    ["5",'5/01'],

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

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

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

    ["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]);
    }
}