var chapter_list = new Array(
  ["Vol.01 Ch.001: The Teddy Bear’s Tears","v01/c001"],
  ["Vol.01 Ch.002: Lavender’s Dream","v01/c002"],
  ["Vol.01 Ch.003: I want to be a Sunflower","v01/c003"],
  ["Vol.01 Ch.004: The Pure Heart of the Water Lily","v01/c004"],
  ["Vol.01 Ch.005: The Breeze of the Autumn Wind, Cosmos","v01/c005"],
  ["Vol.02 Ch.006: Globe Amaranth’s Proposal","v02/c006"],
  ["Vol.02 Ch.007: The White Orchid’s Pure Love","v02/c007"],
  ["Vol.02 Ch.008: A Bitter Sweet Camellia","v02/c008"],
  ["Vol.02 Ch.009: The Freesia that Welcomed in the Spring","v02/c009"],
  ["Vol.02 Ch.010: Forget Me Not","v02/c010"],
  ["Vol.02 Ch.010.5: Extra – The Morning Glory’s Promise","v02/c010.5"],
  ["Vol.03 Ch.011: The Tulip’s Challenge","v03/c011"],
  ["Vol.03 Ch.012: The Carnation’s Ability to be Honest","v03/c012"],
  ["Vol.03 Ch.013: A Dream Bouquet","v03/c013"],
  ["Vol.03 Ch.013.5: Extra – Rindou’s Love","v03/c013.5"]
);

var total_chapters = 15;

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;