var chapter_list = new Array(
  ["Vol.00 Ch.000: Artbook","v00/c000"],
  ["Vol.00 Ch.001: Special 1","v00/c001"],
  ["Vol.00 Ch.002: Special 2","v00/c002"],
  ["Vol.00 Ch.003.3: Special 3 : Toritakunai","v00/c003.3"],
  ["Vol.00 Ch.004: Artbook (New)","v00/c004"],
  ["Vol.00 Ch.005: Special Comic (From the Artbook)","v00/c005"],
  ["Vol.01 Ch.001: Chapter 1","v01/c001"],
  ["Vol.01 Ch.002: Chapter 2","v01/c002"],
  ["Vol.01 Ch.003: Chapter 3","v01/c003"],
  ["Vol.01 Ch.004: Chapter 4","v01/c004"],
  ["Vol.01 Ch.005: Chapter 5","v01/c005"],
  ["Vol.01 Ch.006: Patience is Lacking","v01/c006"],
  ["Vol.01 Ch.006.5: Extra Gentosha version 2nd print","v01/c006.5"],
  ["Vol.02 Ch.001: Chapter 6","v02/c001"],
  ["Vol.02 Ch.002: Chapter 7","v02/c002"],
  ["Vol.02 Ch.003: Chapter 8","v02/c003"],
  ["Vol.02 Ch.004: Chapter 9","v02/c004"],
  ["Vol.02 Ch.005: Chapter 10","v02/c005"],
  ["Vol.02 Ch.006: Shinjuku's Dangerous Zone & Roppongi Dangerous Zone ~ Extra","v02/c006"],
  ["Vol.02 Ch.006.1: Side Story","v02/c006.1"],
  ["Vol.03 Ch.001: Chapter 11","v03/c001"],
  ["Vol.03 Ch.002: Chapter 12","v03/c002"],
  ["Vol.03 Ch.003: Chapter 13","v03/c003"],
  ["Vol.03 Ch.004: Chapter 14","v03/c004"],
  ["Vol.03 Ch.005: Chapter 15","v03/c005"],
  ["Vol.03 Ch.006: Can't Be Trusted ~ Side Story","v03/c006"],
  ["Vol.04 Ch.001: Chapter 16","v04/c001"],
  ["Vol.04 Ch.002: Chapter 17","v04/c002"],
  ["Vol.04 Ch.003: Chapter 18","v04/c003"],
  ["Vol.04 Ch.004: Chapter 19","v04/c004"],
  ["Vol.04 Ch.005: If We Met In Dreams (Kanou) & Dangerous Lost Article ~ Extra","v04/c005"],
  ["Vol.04 Ch.005.1: Special Side Story 1","v04/c005.1"],
  ["Vol.05 Ch.001: Chapter 20","v05/c001"],
  ["Vol.05 Ch.002: Chapter 21","v05/c002"],
  ["Vol.05 Ch.003: Chapter 22","v05/c003"],
  ["Vol.05 Ch.004: Chapter 23","v05/c004"],
  ["Vol.05 Ch.005: Chapter 24","v05/c005"],
  ["Vol.05 Ch.006: Can't Sneak Away?! ~ Side Story","v05/c006"],
  ["Vol.06 Ch.001: Chapter 25","v06/c001"],
  ["Vol.06 Ch.002: Chapter 26","v06/c002"],
  ["Vol.06 Ch.003: Chapter 27","v06/c003"],
  ["Vol.06 Ch.004: Chapter 28","v06/c004"],
  ["Vol.06 Ch.005: Chapter 29","v06/c005"],
  ["Vol.06 Ch.005.2: No Slave ~ Chapter 1 & 2","v06/c005.2"],
  ["Vol.07 Ch.001: Chapter 30","v07/c001"],
  ["Vol.07 Ch.002: Chapter 31","v07/c002"],
  ["Vol.07 Ch.003: Chapter 32","v07/c003"],
  ["Vol.07 Ch.004: Chapter 33","v07/c004"],
  ["Vol.07 Ch.005: Chapter 34","v07/c005"],
  ["Vol.07 Ch.006: Chapter 35","v07/c006"],
  ["Vol.07 Ch.007: Extra","v07/c007"],
  ["Vol.08 Ch.001: Extra Episode:  I Can't Quit ~ Chapter 1","v08/c001"],
  ["Vol.08 Ch.002: Extra Episode: I Can't Quit ~ Chapter 2","v08/c002"],
  ["Vol.08 Ch.003: Extra Episode: I Can't Quit ~ Chapter 3","v08/c003"],
  ["Vol.08 Ch.004: Extra Episode: I Can't Quit ~ Chapter 4","v08/c004"],
  ["Vol.08 Ch.004.5: Extra","v08/c004.5"]
);

var total_chapters = 56;

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]);
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}
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;