var chap_array = new Array(
["2300 6 - SEC: 06",'2300-6'],
["2300 5 - SEC: 05",'2300-5'],
["2300 4 - SEC: 04",'2300-4'],
["2300 3 - SEC: 03",'2300-3'],
["2300 2 - SEC: 02",'2300-2'],
["2300 1 - SEC: 01",'2300-1']);

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]);
}