var chap_array = new Array(
    ["40 - Premonition of Happiness",'40'],

    ["39 - Promise of a Reunion",'39'],

    ["38 - Shape of the Future",'38'],

    ["37 - Ririsu Mirror",'37'],

    ["36 - Visitor",'36'],

    ["35 - School Festival",'35'],

    ["34 - Overlapping Wishes",'34'],

    ["33 - Reason",'33'],

    ["32 - Key",'32'],

    ["31 - True Face",'31'],

    ["30 - Plan",'30'],

    ["29 - Darkness of the School Festival",'29'],

    ["28 - Choice",'28'],

    ["27 - It's a Promise",'27'],

    ["26 - Honest Feelings",'26'],

    ["25 - Scar",'25'],

    ["24 - Nightmare",'24'],

    ["23 - Ghoul",'23'],

    ["22 - Kiss",'22'],

    ["21 - Complex",'21'],

    ["20 - Over Comsumption",'20'],

    ["19 - The Girl That Delivers Snow",'19'],

    ["18 - New Semester",'18'],

    ["17 - Repentance",'17'],

    ["16 - Witch's Ranch",'16'],

    ["15 - If We Can Be Friends",'15'],

    ["14 - Human City",'14'],

    ["13 - Sunflower Colored Summer Break",'13'],

    ["12 - Teach Me How To Study!",'12'],

    ["11 - Blood",'11'],

    ["10 - You Don't Have A Problem With That Do You",'10'],

    ["9 - Secret",'9'],

    ["8 - Wish Upon The Moon",'8'],

    ["7 - Let's Meet The Deadline!",'7'],

    ["6 - Artsy Birthday",'6'],

    ["5 - Mischievous Love",'5'],

    ["4 - Make Friends With Your Seniors,OK",'4'],

    ["3 - Let's Get Into Some Club Activities",'3'],

    ["2 - Enveloped By A Dark Dream",'2'],

    ["1 - The Academy Vampire",'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]);
    }
}