var chap_array = new Array(
    ["12 - Family Resturant Bomber",'12/01'],

    ["11 - Dragon Tiger Stand Togther",'11/01'],

    ["10 - The Destination of the Confession",'10/00'],

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

    ["8 - Within Her Fragile Heart",'8/01'],

    ["7 - A Well Matched Couple",'7/01'],

    ["6 - The Rumored Couple",'6/01'],

    ["5 - Aisaka and Ryuuji's First Mission",'5/01'],

    ["4 - Great Mission - Passing Practice of Love",'4/01'],

    ["3 - Close Proximity",'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]);
    }
}