var chap_array = new Array(
["Blue Spring 7",'blue-spring-7'],
["Blue Spring 6",'blue-spring-6'],
["Blue Spring 5",'blue-spring-5'],
["Blue Spring 4",'blue-spring-4'],
["Blue Spring 3",'blue-spring-3'],
["Blue Spring 2",'blue-spring-2'],
["Blue Spring 1",'blue-spring-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]);
}