var chap_array = new Array(
    ["18 - Shake Swing",'18/01'],

    ["17 - The Composition Changes Once",'17/01'],

    ["16 - Bitter Sweet Recollection",'16/01'],

    ["15 - Gears Don't Question",'15/01'],

    ["14 - Do You Remember",'14/00'],

    ["13 - The Black Hair, Once Again",'13/01'],

    ["12 - That is Ticking and Ticking and Getting into Gear",'12/01'],

    ["11 - Possessed Heart",'11/00'],

    ["10 - Killing Wind",'10/01'],

    ["9 - The Strategy Dances, and Does Not Dance",'9/01'],

    ["8 - The Connecting Ring, The Connected Ring",'8/01'],

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

    ["6 - Isolate the Hedge",'6/01'],

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

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

    ["3 - The Invisible Spiders' Nest",'3/01'],

    ["2 - It's Not a Time to Smile",'2/01'],

    ["1 - What Would You Do In This Case",'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]);
    }
}