var chapter_list = new Array(
  ["Vol.01 Ch.001: Come on You Get You, My Darling ♥ Paper!","v01/c001"],
  ["Vol.01 Ch.002: Bloom!  Bloom Flower of Love! ♥ Paper!","v01/c002"],
  ["Vol.01 Ch.003: Love and Study Vacation Paper!","v01/c003"],
  ["Vol.01 Ch.003.1: [Side Story] Shopping Boogie","v01/c003.1"],
  ["Vol.02 Ch.004: I'm a Lousy Student! - Paper","v02/c004"],
  ["Vol.02 Ch.005: The 97 War of Studies Paper","v02/c005"],
  ["Vol.02 Ch.006: Sad Serenade","v02/c006"],
  ["Vol.02 Ch.007: The Last Stop for Love and Study","v02/c007"]
);

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;