var chapter_list = new Array(
  ["Vol.01 Ch.001","v01/c001"],
  ["Vol.01 Ch.002","v01/c002"],
  ["Vol.01 Ch.003","v01/c003"],
  ["Vol.01 Ch.004","v01/c004"],
  ["Vol.02 Ch.005","v02/c005"],
  ["Vol.02 Ch.006","v02/c006"],
  ["Vol.02 Ch.007","v02/c007"],
  ["Vol.02 Ch.008","v02/c008"],
  ["Vol.02 Ch.008.5: Side Story","v02/c008.5"],
  ["Vol.03 Ch.009","v03/c009"],
  ["Vol.03 Ch.010","v03/c010"],
  ["Vol.03 Ch.011","v03/c011"],
  ["Vol.03 Ch.012","v03/c012"],
  ["Vol.03 Ch.013","v03/c013"],
  ["Vol.03 Ch.013.1: Extra 1","v03/c013.1"],
  ["Vol.03 Ch.013.2: Extra 2","v03/c013.2"],
  ["Vol.03 Ch.013.3: Extra 3","v03/c013.3"],
  ["Vol.04 Ch.000: chp. 14-18","v04/c000"],
  ["Vol.05 Ch.000: chp. 19-23","v05/c000"],
  ["Vol.06 Ch.024","v06/c024"],
  ["Vol.06 Ch.025","v06/c025"],
  ["Vol.06 Ch.026","v06/c026"],
  ["Vol.06 Ch.027: +extra","v06/c027"],
  ["Vol.07 Ch.028","v07/c028"],
  ["Vol.07 Ch.029","v07/c029"],
  ["Vol.08 Ch.032","v08/c032"],
  ["Vol.08 Ch.033","v08/c033"],
  ["Vol.08 Ch.034","v08/c034"],
  ["Vol.08 Ch.035","v08/c035"],
  ["Vol.08 Ch.036","v08/c036"],
  ["Vol.09 Ch.037","v09/c037"],
  ["Vol.09 Ch.038","v09/c038"],
  ["Vol.09 Ch.039","v09/c039"],
  ["Vol.09 Ch.040","v09/c040"],
  ["Vol.09 Ch.041","v09/c041"],
  ["Vol.10 Ch.042","v10/c042"],
  ["Vol.10 Ch.043","v10/c043"],
  ["Vol.10 Ch.044","v10/c044"],
  ["Vol.10 Ch.046","v10/c046"],
  ["Vol.11 Ch.047","v11/c047"],
  ["Vol.11 Ch.048","v11/c048"],
  ["Vol.11 Ch.049","v11/c049"],
  ["Vol.11 Ch.050","v11/c050"],
  ["Vol.11 Ch.050.1: Kaji Special","v11/c050.1"],
  ["Vol.12 Ch.050.2: Kaji Special 2","v12/c050.2"],
  ["Vol.12 Ch.051","v12/c051"],
  ["Vol.12 Ch.052","v12/c052"],
  ["Vol.12 Ch.053","v12/c053"],
  ["Vol.12 Ch.054","v12/c054"],
  ["Vol.12 Ch.054.5: Side Story","v12/c054.5"],
  ["Vol.12 Ch.055","v12/c055"],
  ["Vol.13 Ch.056","v13/c056"],
  ["Vol.13 Ch.057","v13/c057"],
  ["Vol.13 Ch.057.5: Etou Kiriya Chapter","v13/c057.5"],
  ["Vol.13 Ch.058","v13/c058"],
  ["Vol.13 Ch.059","v13/c059"],
  ["Vol.14 Ch.059.5: Hihara Special","v14/c059.5"],
  ["Vol.14 Ch.060","v14/c060"],
  ["Vol.14 Ch.061","v14/c061"]
);

var total_chapters = 59;

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;