var chap_array = new Array(
["8mm 6 - Light and Shadow!!",'8mm-6'],
["8mm 5 - 8mm",'8mm-5'],
["8mm 4 - You Wanna Buy?",'8mm-4'],
["8mm 3 - The Reason They are Here",'8mm-3'],
["8mm 2 - Only She Knows",'8mm-2'],
["8mm 1 - And So I Became Rich",'8mm-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]);
}