var chapter_list = new Array(
  ["Vol.01 Ch.001: An Intern's Night","v01/c001"],
  ["Vol.01 Ch.002: Eel And God's Hand","v01/c002"],
  ["Vol.01 Ch.003: The Price Of 75","v01/c003"],
  ["Vol.01 Ch.004: Summer Clouds","v01/c004"],
  ["Vol.01 Ch.005: Surgical Department, Intern Clinic, Doctor's Offices And Saito","v01/c005"],
  ["Vol.01 Ch.006: The First Lie","v01/c006"],
  ["Vol.01 Ch.007: The 'First Rate' Trap","v01/c007"],
  ["Vol.02 Ch.008: The Bad New-Interview","v02/c008"],
  ["Vol.02 Ch.009: Saburo Kita","v02/c009"],
  ["Vol.02 Ch.010","v02/c010"],
  ["Vol.02 Ch.011: The Lawless Tower","v02/c011"],
  ["Vol.02 Ch.012: Vindication","v02/c012"],
  ["Vol.02 Ch.013: Surgeon","v02/c013"],
  ["Vol.02 Ch.014","v02/c014"],
  ["Vol.02 Ch.015","v02/c015"],
  ["Vol.02 Ch.016","v02/c016"],
  ["Vol.03 Ch.017","v03/c017"],
  ["Vol.03 Ch.018: The Poor and the Stupid","v03/c018"]
);

var total_chapters = 18;

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;