var chap_array = new Array(
    ["17 - Dangerous Nights Girls Saurus",'17/01'],

    ["16 - Yamoto Girls Saurus",'16/01'],

    ["15 - Public Bath, Dinosaur Girl",'15/01'],

    ["14 - No Compassion, No Justice Dinosaur Girl",'14/01'],

    ["13 - Fanatic Dinosaur Girl",'13/01'],

    ["12 - Younger Sister - Girls Saurus",'12/00'],

    ["11 - Mini - Girls Saurus",'11/01'],

    ["10 - Monster - Girls Saurus",'10/01'],

    ["9 - Girls Saurus - Competition II",'9/01'],

    ["8 - Girls Saurus - Competition I",'8/01'],

    ["7 - Ghost - Girls Saurus",'7/01'],

    ["6 - Girls Saurus - Train",'6/00'],

    ["5 - Dinosaur's Shyness",'5/01'],

    ["4 - Dinosaur's Attack",'4/01'],

    ["3 - Dinosaur's Trap",'3/01'],

    ["2 - Dinosaur's Feelings",'2/01'],

    ["1 - Girls Saurus",'1/00']
);
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]);
    }
}