var chapter_list = new Array(
  ["Vol.01 Ch.001: Chapter 01","v01/c001"],
  ["Vol.01 Ch.002: Chicken George","v01/c002"],
  ["Vol.01 Ch.003: Chicken George","v01/c003"],
  ["Vol.01 Ch.004","v01/c004"],
  ["Vol.01 Ch.005","v01/c005"],
  ["Vol.01 Ch.006","v01/c006"],
  ["Vol.01 Ch.007","v01/c007"],
  ["Vol.01 Ch.008","v01/c008"],
  ["Vol.01 Ch.009","v01/c009"],
  ["Vol.01 Ch.010","v01/c010"],
  ["Vol.01 Ch.011","v01/c011"],
  ["Vol.01 Ch.012","v01/c012"],
  ["Vol.01 Ch.013","v01/c013"],
  ["Vol.01 Ch.014","v01/c014"],
  ["Vol.01 Ch.015","v01/c015"],
  ["Vol.01 Ch.016","v01/c016"],
  ["Vol.01 Ch.017","v01/c017"],
  ["Vol.01 Ch.018","v01/c018"],
  ["Vol.01 Ch.019","v01/c019"],
  ["Vol.02 Ch.020","v02/c020"],
  ["Vol.02 Ch.021","v02/c021"],
  ["Vol.02 Ch.022","v02/c022"],
  ["Vol.02 Ch.023","v02/c023"],
  ["Vol.02 Ch.024","v02/c024"],
  ["Vol.02 Ch.025","v02/c025"],
  ["Vol.02 Ch.026: The Green Haired Boy","v02/c026"],
  ["Vol.02 Ch.027","v02/c027"],
  ["Vol.02 Ch.028: The Green-Haired Boy","v02/c028"],
  ["Vol.02 Ch.029","v02/c029"],
  ["Vol.02 Ch.030","v02/c030"],
  ["Vol.02 Ch.031","v02/c031"],
  ["Vol.02 Ch.032","v02/c032"],
  ["Vol.02 Ch.033","v02/c033"],
  ["Vol.02 Ch.034","v02/c034"],
  ["Vol.02 Ch.035","v02/c035"],
  ["Vol.02 Ch.036","v02/c036"],
  ["Vol.02 Ch.037","v02/c037"],
  ["Vol.02 Ch.038","v02/c038"],
  ["Vol.02 Ch.039","v02/c039"]
);

var total_chapters = 39;

for (var i = 0; i < chapter_list.length; i++) {
  document.getElementById('top_chapter_list').options[i] = new Option(chapter_list[i][0], chapter_list[i][1]);
  document.getElementById('bottom_chapter_list').options[i] = new Option(chapter_list[i][0], chapter_list[i][1]);
}
document.getElementById('top_chapter_list').value=current_chapter;
document.getElementById('bottom_chapter_list').value=current_chapter;
var current_chapter_index = document.getElementById('top_chapter_list').selectedIndex;