var chapter_list = new Array(
  ["Vol.01 Ch.001: Alligator","v01/c001"],
  ["Vol.01 Ch.002: Guardian: 1","v01/c002"],
  ["Vol.01 Ch.003: Guardian: 2","v01/c003"],
  ["Vol.01 Ch.004: Requiem: 1","v01/c004"],
  ["Vol.01 Ch.005: Requiem: 2","v01/c005"],
  ["Vol.01 Ch.006: Giant & Explosion: 1","v01/c006"],
  ["Vol.01 Ch.007: Giant & Explosion: 2","v01/c007"],
  ["Vol.01 Ch.008: Giant & Explosion: 3","v01/c008"],
  ["Vol.02 Ch.009: Mermaid","v02/c009"],
  ["Vol.02 Ch.010: Flying Monkey Jasper","v02/c010"],
  ["Vol.02 Ch.011: Darkness. Vacuum: 1","v02/c011"],
  ["Vol.02 Ch.012: Darkness.Hallow: 2","v02/c012"],
  ["Vol.02 Ch.013: Darkness. Hallow: 3","v02/c013"],
  ["Vol.02 Ch.014: Darkness∙Cyclone: 4","v02/c014"],
  ["Vol.02 Ch.015: Darkness∙Cyclone: 5","v02/c015"],
  ["Vol.02 Ch.016: The Witch","v02/c016"],
  ["Vol.03 Ch.017: The Attack","v03/c017"],
  ["Vol.03 Ch.018: Gabriella","v03/c018"],
  ["Vol.03 Ch.019: Inoue: 1","v03/c019"],
  ["Vol.03 Ch.020: Inoue: 2","v03/c020"],
  ["Vol.03 Ch.021: Sheryl: 1","v03/c021"],
  ["Vol.03 Ch.022: Sheryl: 2","v03/c022"],
  ["Vol.03 Ch.023: The Way Through Darkness","v03/c023"],
  ["Vol.03 Ch.023.5: Flashback: Huya","v03/c023.5"],
  ["Vol.04 Ch.024: Lee Meilang","v04/c024"],
  ["Vol.04 Ch.025: The Corridor of Death","v04/c025"],
  ["Vol.04 Ch.026: Brutal Wake-Up","v04/c026"],
  ["Vol.04 Ch.027: Back to Cicero City","v04/c027"],
  ["Vol.04 Ch.028: The Decapitator","v04/c028"],
  ["Vol.04 Ch.029: Darkness Returns","v04/c029"],
  ["Vol.04 Ch.030: The Collaboration","v04/c030"],
  ["Vol.04 Ch.031: The Bolt","v04/c031"],
  ["Vol.05 Ch.032: Mantis Vs Cyclone","v05/c032"],
  ["Vol.05 Ch.033: The Bear","v05/c033"],
  ["Vol.05 Ch.034: Beastfight","v05/c034"],
  ["Vol.05 Ch.035: Awakening from Darkness","v05/c035"],
  ["Vol.05 Ch.036: Reunion","v05/c036"],
  ["Vol.05 Ch.037: Shinigami","v05/c037"],
  ["Vol.05 Ch.038: The Finishing Blow","v05/c038"],
  ["Vol.05 Ch.039: God of War","v05/c039"],
  ["Vol.06 Ch.040: Kyrie","v06/c040"],
  ["Vol.06 Ch.041: Promise","v06/c041"],
  ["Vol.06 Ch.043: When You Must Fight","v06/c043"],
  ["Vol.06 Ch.044: Angels and Demons","v06/c044"],
  ["Vol.06 Ch.045: To Legenda","v06/c045"],
  ["Vol.06 Ch.046: Raging Beast vs Alligator","v06/c046"],
  ["Vol.06 Ch.047: Dies Irae","v06/c047"]
);

var total_chapters = 47;

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;