var chapter_list = new Array(
  ["Vol.01 Ch.001.1: A.L.L HANSHIN KYOJIN of first year class 2 !","v01/c001.1"],
  ["Vol.01 Ch.001.2","v01/c001.2"],
  ["Vol.01 Ch.002.1","v01/c002.1"],
  ["Vol.01 Ch.002.2","v01/c002.2"],
  ["Vol.01 Ch.003","v01/c003"],
  ["Vol.01 Ch.004","v01/c004"],
  ["Vol.02 Ch.005","v02/c005"],
  ["Vol.02 Ch.006.1","v02/c006.1"],
  ["Vol.02 Ch.006.2","v02/c006.2"],
  ["Vol.02 Ch.007.1","v02/c007.1"],
  ["Vol.02 Ch.007.2","v02/c007.2"],
  ["Vol.02 Ch.008.1","v02/c008.1"],
  ["Vol.02 Ch.008.2","v02/c008.2"],
  ["Vol.03 Ch.009.1","v03/c009.1"],
  ["Vol.03 Ch.009.2","v03/c009.2"],
  ["Vol.03 Ch.010.1","v03/c010.1"],
  ["Vol.03 Ch.010.2","v03/c010.2"],
  ["Vol.03 Ch.011","v03/c011"],
  ["Vol.03 Ch.012","v03/c012"],
  ["Vol.04 Ch.013","v04/c013"],
  ["Vol.04 Ch.014","v04/c014"],
  ["Vol.04 Ch.015","v04/c015"],
  ["Vol.04 Ch.016","v04/c016"],
  ["Vol.04 Ch.016.5: Extra chapter","v04/c016.5"],
  ["Vol.05 Ch.017.1","v05/c017.1"],
  ["Vol.05 Ch.017.2","v05/c017.2"],
  ["Vol.05 Ch.018","v05/c018"],
  ["Vol.05 Ch.019","v05/c019"],
  ["Vol.05 Ch.020","v05/c020"],
  ["Vol.06 Ch.021","v06/c021"],
  ["Vol.06 Ch.022","v06/c022"],
  ["Vol.06 Ch.023","v06/c023"],
  ["Vol.06 Ch.024","v06/c024"],
  ["Vol.07 Ch.025","v07/c025"],
  ["Vol.07 Ch.026","v07/c026"],
  ["Vol.07 Ch.027","v07/c027"],
  ["Vol.07 Ch.028","v07/c028"],
  ["Vol.08 Ch.029","v08/c029"],
  ["Vol.08 Ch.030","v08/c030"],
  ["Vol.08 Ch.031","v08/c031"],
  ["Vol.08 Ch.032","v08/c032"],
  ["Vol.09 Ch.033","v09/c033"],
  ["Vol.09 Ch.034","v09/c034"],
  ["Vol.09 Ch.035","v09/c035"],
  ["Vol.09 Ch.036","v09/c036"],
  ["Vol.10 Ch.037","v10/c037"],
  ["Vol.10 Ch.038","v10/c038"],
  ["Vol.10 Ch.039","v10/c039"],
  ["Vol.10 Ch.040","v10/c040"],
  ["Vol.11 Ch.041","v11/c041"],
  ["Vol.11 Ch.042","v11/c042"],
  ["Vol.11 Ch.043","v11/c043"],
  ["Vol.11 Ch.044","v11/c044"],
  ["Vol.12 Ch.045","v12/c045"],
  ["Vol.12 Ch.046","v12/c046"],
  ["Vol.12 Ch.047","v12/c047"],
  ["Vol.12 Ch.047.5: Side story","v12/c047.5"],
  ["Vol.13 Ch.048","v13/c048"],
  ["Vol.13 Ch.049","v13/c049"],
  ["Vol.13 Ch.050","v13/c050"],
  ["Vol.13 Ch.051","v13/c051"],
  ["Vol.14 Ch.052","v14/c052"],
  ["Vol.14 Ch.053","v14/c053"],
  ["Vol.14 Ch.054","v14/c054"],
  ["Vol.14 Ch.055","v14/c055"],
  ["Vol.15 Ch.056","v15/c056"],
  ["Vol.15 Ch.057","v15/c057"],
  ["Vol.15 Ch.058","v15/c058"],
  ["Vol.15 Ch.059","v15/c059"],
  ["Vol.16 Ch.060","v16/c060"],
  ["Vol.16 Ch.061","v16/c061"],
  ["Vol.16 Ch.062","v16/c062"]
);

var total_chapters = 72;

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;