var chap_array = new Array(
    ["35 - And Then, it's Spring Again",'35'],

    ["34 - Exposure to the Sun",'34'],

    ["33 - Scene of a Family",'33'],

    ["32 - The Love of a Lifetime",'32'],

    ["31 - The End of Summer",'31'],

    ["30 - A Long Night for the Two Part II",'30'],

    ["29 - A Long Night for the Two Part I",'29'],

    ["28 - Koshiro's Abandoned Things",'28'],

    ["27 - Luckily, So Far Away",'27'],

    ["26 - What if Memories Change",'26'],

    ["25 - Summer Alone There Are Feelings",'25'],

    ["24 - No Way Out",'24'],

    ["23 - Brother, I Am Sorry",'23'],

    ["22 - Observer",'22'],

    ["21 - Public Notice",'21'],

    ["20 - First Love",'20'],

    ["19 - Two People Wandering the Face of Earth",'19'],

    ["18 - Jacket Colored with Love",'18'],

    ["17 - Running Girl",'17'],

    ["16 - To Say Honestly",'16'],

    ["15 - The Warmth of December",'15'],

    ["14 - A Romantic Autumn",'14'],

    ["13 - A Way to Become Siblings",'13'],

    ["12 - Love Letter",'12'],

    ["11 - Like, Hate, Like",'11'],

    ["10 - Cute, Cute Little Sister",'10'],

    ["9 - Mother's Lover",'9'],

    ["8 - Summer Holidays",'8'],

    ["7 - Ghost of Suspicion",'7'],

    ["6 - Puberty",'6'],

    ["5 - Till the Full Moon Comes",'5'],

    ["4 - Let's Sleep Together Every Night",'4'],

    ["3 - Stop Calling Me Brother!",'3'],

    ["2 - An Unhappy Morning",'2'],

    ["1 - The Snow of Spring",'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]);
    }
}