var chapter_list = new Array(
  ["Vol.01 Ch.001: The Phoenix and the Girl","v01/c001"],
  ["Vol.01 Ch.002: The Phoenix and Muay Thai","v01/c002"],
  ["Vol.01 Ch.003: Phoenix and Dogs","v01/c003"],
  ["Vol.01 Ch.004: The Phoenix and the Kaiser","v01/c004"],
  ["Vol.01 Ch.005: The Phoenix's New Weapon","v01/c005"],
  ["Vol.01 Ch.006: The Phoenix and Excitement at the Baths ♪","v01/c006"],
  ["Vol.01 Ch.007: The BL Group's Dark Meeting","v01/c007"],
  ["Vol.01 Ch.008: The Phoenix and the King of the Forest","v01/c008"]
);

var total_chapters = 8;

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;