var chap_array = new Array(
    ["21 - If It Isn't",'21'],

    ["20 - Now Only That",'20'],

    ["19 - That Time, I",'19'],

    ["18 - I Resemble Someone",'18'],

    ["17 - In Human Hearts",'17'],

    ["16 - There is no Difference",'16'],

    ["15 - An Awkward Child",'15'],

    ["14 - How Can It",'14'],

    ["13 - Friend, You Say",'13'],

    ["12 - The Obvious Thing",'12'],

    ["11 - Too Late",'11'],

    ["10 - What Do You See",'10'],

    ["9 - Tell Me!",'9'],

    ["8 - The Obstacle",'8'],

    ["7 - For What",'7'],

    ["6 - Here, Forever",'6'],

    ["5 - Embarkment",'5'],

    ["4 - If It's Still a Man",'4'],

    ["3 - I Will Protect You",'3'],

    ["2 - Aren't We Friends",'2'],

    ["1 - Which Side Will You Choose",'1']
);
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]);
    }
}