var chapter_list = new Array(
  ["Vol.01 Ch.001: The Mysterious Girl's Invasion","v01/c001"],
  ["Vol.01 Ch.002: Body and Soul","v01/c002"],
  ["Vol.01 Ch.003: I Found the Mysterious Natsuki!","v01/c003"],
  ["Vol.01 Ch.004: Swing, Hold on My Mii!","v01/c004"],
  ["Vol.01 Ch.005: Natsuki-sensei's Heartpounding Swim Lessons!","v01/c005"],
  ["Vol.01 Ch.006: Poolside of Love","v01/c006"],
  ["Vol.01 Ch.007: Spending the Night with Kanade!","v01/c007"],
  ["Vol.01 Ch.007.5: Kanade's Investigation Scoop!!","v01/c007.5"],
  ["Vol.02 Ch.008: Summer Time's Secret","v02/c008"],
  ["Vol.02 Ch.009: After Summer Comes Fall","v02/c009"],
  ["Vol.02 Ch.010: House Work Never Ends!?","v02/c010"],
  ["Vol.02 Ch.011: The First Star Mine","v02/c011"],
  ["Vol.02 Ch.012: The Thing That Binds Those Letters Together","v02/c012"],
  ["Vol.02 Ch.013: The Season of Love Changes Color","v02/c013"],
  ["Vol.02 Ch.014: The Bear, the Movie and the Pendant","v02/c014"],
  ["Vol.02 Ch.014.5: Ane Doki x Inumarudashi","v02/c014.5"],
  ["Vol.03 Ch.015: I Won't Sleep Tonight","v03/c015"],
  ["Vol.03 Ch.016: A Kiss? I Like You? I Hate You?","v03/c016"],
  ["Vol.03 Ch.017: Silent Week","v03/c017"],
  ["Vol.03 Ch.018: One Night's...","v03/c018"],
  ["Vol.03 Ch.019: 4 Years Later","v03/c019"],
  ["Vol.03 Ch.020: The Girl Who Was Stalking Her Prey","v03/c020"],
  ["Vol.03 Ch.021: Queen of the Underwear World!!","v03/c021"],
  ["Vol.04 Ch.022: Natsuki Is Money","v04/c022"],
  ["Vol.04 Ch.023: It's Begun, the Winter Sales!!","v04/c023"],
  ["Vol.04 Ch.024: Dad Is Back!","v04/c024"],
  ["Vol.04 Ch.025: My Feelings","v04/c025"],
  ["Vol.04 Ch.026: Last Chapter: These Feelings","v04/c026"],
  ["Vol.04 Ch.026.5: Epilogue","v04/c026.5"]
);

var total_chapters = 29;

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;