var chap_array = new Array(
["Koko ni Iru Yo! 16",'koko-ni-iru-yo%21-16'],
["Koko ni Iru Yo! 15",'koko-ni-iru-yo%21-15'],
["Koko ni Iru Yo! 14",'koko-ni-iru-yo%21-14'],
["Koko ni Iru Yo! 13",'koko-ni-iru-yo%21-13'],
["Koko ni Iru Yo! 12",'koko-ni-iru-yo%21-12'],
["Koko ni Iru Yo! 11",'koko-ni-iru-yo%21-11'],
["Koko ni Iru Yo! 10",'koko-ni-iru-yo%21-10'],
["Koko ni Iru Yo! 9",'koko-ni-iru-yo%21-9'],
["Koko ni Iru Yo! 8",'koko-ni-iru-yo%21-8'],
["Koko ni Iru Yo! 7",'koko-ni-iru-yo%21-7'],
["Koko ni Iru Yo! 6",'koko-ni-iru-yo%21-6'],
["Koko ni Iru Yo! 5",'koko-ni-iru-yo%21-5'],
["Koko ni Iru Yo! 4",'koko-ni-iru-yo%21-4'],
["Koko ni Iru Yo! 3",'koko-ni-iru-yo%21-3'],
["Koko ni Iru Yo! 2",'koko-ni-iru-yo%21-2'],
["Koko ni Iru Yo! 1",'koko-ni-iru-yo%21-1']);

for (var i=0; i<chap_array.length; i++) {
document.getElementById('chapter_select').options[i] = new Option(chap_array[i][0],chap_array[i][1]);
}