var chap_array = new Array(
    ["27 - Graduation Album",'27/01'],

    ["26 - The Library For Some Reason",'26/01'],

    ["25 - Farewell Koshien",'25/01'],

    ["24 - Here We Are At Koshien",'24/01'],

    ["23 - I Did It Koshien",'23/01'],

    ["22 - The Dirt of Happiness",'22/01'],

    ["21 - Good Luck",'21/01'],

    ["20 - Welcome Transfer Student",'20/01'],

    ["19 - Official Couple",'19/01'],

    ["18 - Aim for Koshien",'18/01'],

    ["17 - Year End Cooperation",'17/01'],

    ["16 - Love During the Drafts",'16/01'],

    ["15 - The Track Club in Peril",'15/01'],

    ["14 - Sketchbook of Love",'14/01'],

    ["13 - My Seventeenth Summer",'13/01'],

    ["12 - Preliminaries in Tears",'12/01'],

    ["11 - Fated Rival",'11/01'],

    ["10 - Can we Really Win",'10/01'],

    ["9 - Rain Followed by Clear Skies",'9/01'],

    ["8 - Abnormal Rookies",'8/01'],

    ["7 - A Friendship Cracked",'7/01'],

    ["6 - A School Festival Gone Wrong",'6/01'],

    ["5 - Happy Birthday Sweet Sixteen",'5/01'],

    ["4 - Laughing Face Crying Heart",'4/01'],

    ["3 - Trembling Youth",'3/01'],

    ["2 - A Powerful Rival Appears",'2/01'],

    ["1 - A Smile would Look Good on Her",'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]);
    }
}