var chap_array = new Array(
    ["12 - Hope",'12'],

    ["11 - The Twilight of Gods",'11'],

    ["10 - Awaken",'10'],

    ["9 - The Undulating Destiny",'9'],

    ["8 - The Lily Meadow Memory",'8'],

    ["7 - The Gong of Destiny",'7'],

    ["6 - Justice and Power",'6'],

    ["5 - Destiny",'5'],

    ["4 - The Path",'4'],

    ["3 - The Meaningless Battle",'3'],

    ["2 - The Hollow Statue",'2'],

    ["1 - The Battle Maiden",'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]);
    }
}