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

    ["11 - Parting",'11'],

    ["10 - Compulsion",'10'],

    ["9 - Incoming",'9'],

    ["8 - Disappear",'8'],

    ["7 - Traitor",'7'],

    ["6 - Restraint",'6'],

    ["5 - File",'5'],

    ["4 - Go On",'4'],

    ["3 - Key Item",'3'],

    ["2 - Game Start",'2'],

    ["1 - Player",'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]);
    }
}