var chapter_list = new Array(
  ["Vol.00 Ch.000","v00/c000"],
  ["Vol.01 Ch.001.1: wild ones","v01/c001.1"],
  ["Vol.01 Ch.001.2","v01/c001.2"],
  ["Vol.01 Ch.002","v01/c002"],
  ["Vol.01 Ch.003","v01/c003"],
  ["Vol.01 Ch.004","v01/c004"],
  ["Vol.02 Ch.005","v02/c005"],
  ["Vol.02 Ch.006","v02/c006"],
  ["Vol.02 Ch.007.1","v02/c007.1"],
  ["Vol.02 Ch.007.2","v02/c007.2"],
  ["Vol.02 Ch.007.3","v02/c007.3"],
  ["Vol.02 Ch.008","v02/c008"],
  ["Vol.02 Ch.009","v02/c009"],
  ["Vol.03 Ch.010","v03/c010"],
  ["Vol.03 Ch.011","v03/c011"],
  ["Vol.03 Ch.012","v03/c012"],
  ["Vol.03 Ch.013","v03/c013"],
  ["Vol.03 Ch.014","v03/c014"],
  ["Vol.03 Ch.015","v03/c015"],
  ["Vol.04 Ch.016","v04/c016"],
  ["Vol.04 Ch.017","v04/c017"],
  ["Vol.04 Ch.018","v04/c018"],
  ["Vol.04 Ch.019","v04/c019"],
  ["Vol.04 Ch.020","v04/c020"],
  ["Vol.04 Ch.021","v04/c021"],
  ["Vol.05 Ch.022","v05/c022"],
  ["Vol.05 Ch.023","v05/c023"],
  ["Vol.05 Ch.024","v05/c024"],
  ["Vol.05 Ch.025","v05/c025"],
  ["Vol.05 Ch.026","v05/c026"],
  ["Vol.05 Ch.027","v05/c027"],
  ["Vol.06 Ch.028","v06/c028"],
  ["Vol.06 Ch.029","v06/c029"],
  ["Vol.06 Ch.030","v06/c030"],
  ["Vol.06 Ch.031","v06/c031"],
  ["Vol.06 Ch.032","v06/c032"],
  ["Vol.06 Ch.033","v06/c033"],
  ["Vol.07 Ch.034","v07/c034"],
  ["Vol.07 Ch.035","v07/c035"],
  ["Vol.07 Ch.036","v07/c036"],
  ["Vol.07 Ch.037","v07/c037"],
  ["Vol.08 Ch.039","v08/c039"],
  ["Vol.08 Ch.040: The Precious Things I Reach For Disappear","v08/c040"],
  ["Vol.08 Ch.041: Secret Photograph of a Boy and Girl","v08/c041"],
  ["Vol.08 Ch.042: I Want to be With You Like This Forever","v08/c042"],
  ["Vol.08 Ch.043: I Can't Reveal My Past Yet to You Who Are Precious to Me","v08/c043"],
  ["Vol.08 Ch.044: Come On! Everyone is Waiting for You","v08/c044"],
  ["Vol.09 Ch.045: Supporting with Kindness","v09/c045"],
  ["Vol.09 Ch.046","v09/c046"],
  ["Vol.09 Ch.047: Missing Another's Feelings, My Heart Hurts","v09/c047"],
  ["Vol.09 Ch.048: Love Show Down","v09/c048"],
  ["Vol.09 Ch.049: Sachie-sama I'm Going to Get Serious Soon","v09/c049"],
  ["Vol.09 Ch.050: Protecting Your Smile is My Everything","v09/c050"],
  ["Vol.10 Ch.051: Happiness is Within These Hands","v10/c051"],
  ["Vol.10 Ch.052: Come Along on the Field Trip!! And Make Memories with Everyone!","v10/c052"],
  ["Vol.10 Ch.053: There is only a short time left to spend everyday life together","v10/c053"],
  ["Vol.10 Ch.054: The Beginning of a New Year with You","v10/c054"],
  ["Vol.10 Ch.055: You Are My Friend!","v10/c055"],
  ["Vol.10 Ch.056: Together Towards A Brilliant Future: End","v10/c056"]
);

var total_chapters = 59;

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;