var chapter_list = new Array(
  ["Vol.01 Ch.001: Baby Steps","v01/c001"],
  ["Vol.01 Ch.002: Perfect!","v01/c002"],
  ["Vol.01 Ch.003.1: I'll Become Stronger","v01/c003.1"],
  ["Vol.01 Ch.003.2: [continuation]","v01/c003.2"],
  ["Vol.01 Ch.004: Sudden Shot","v01/c004"],
  ["Vol.01 Ch.005: I Understand","v01/c005"],
  ["Vol.02 Ch.006: Can You See It?","v02/c006"],
  ["Vol.02 Ch.007: The Life-changing Natsu (Summer)","v02/c007"],
  ["Vol.02 Ch.008: Not the Usual Place","v02/c008"],
  ["Vol.02 Ch.009: What?","v02/c009"],
  ["Vol.02 Ch.010: A Change in Tactics","v02/c010"],
  ["Vol.02 Ch.011: More than Expected","v02/c011"],
  ["Vol.02 Ch.012: Just a Little Bit","v02/c012"],
  ["Vol.02 Ch.013: The Way","v02/c013"],
  ["Vol.03 Ch.014: To Victory","v03/c014"],
  ["Vol.03 Ch.015: To Giant Strides","v03/c015"],
  ["Vol.03 Ch.016: Break Time","v03/c016"],
  ["Vol.03 Ch.017: Summer Tempest","v03/c017"],
  ["Vol.03 Ch.018: Where Are You Looking?","v03/c018"],
  ["Vol.03 Ch.019: The Course of Progress","v03/c019"],
  ["Vol.03 Ch.020: Dangerous Territory","v03/c020"],
  ["Vol.03 Ch.021: Hypothesis","v03/c021"],
  ["Vol.03 Ch.022: Danger","v03/c022"],
  ["Vol.03 Ch.023: A Winning Chance","v03/c023"],
  ["Vol.04 Ch.024: Probability","v04/c024"],
  ["Vol.04 Ch.025: Victory or Defeat","v04/c025"],
  ["Vol.04 Ch.026: Foreboding","v04/c026"],
  ["Vol.04 Ch.027: Memory","v04/c027"],
  ["Vol.04 Ch.028: A Break","v04/c028"],
  ["Vol.04 Ch.029: A World of Its Own","v04/c029"],
  ["Vol.04 Ch.030: Not Adding Up, Not Taking Away","v04/c030"],
  ["Vol.04 Ch.031: Latent Energy","v04/c031"],
  ["Vol.04 Ch.032: A Piece of Smile","v04/c032"],
  ["Vol.04 Ch.033: An Emergent Situation","v04/c033"],
  ["Vol.05 Ch.034: A Whole New World","v05/c034"],
  ["Vol.05 Ch.035: The Battle Starts Now","v05/c035"],
  ["Vol.05 Ch.036: A File to Throw Down Araya","v05/c036"],
  ["Vol.05 Ch.037: Aggressive Meticulousness","v05/c037"],
  ["Vol.05 Ch.038: One Giant Step","v05/c038"],
  ["Vol.05 Ch.039: Compensation","v05/c039"],
  ["Vol.05 Ch.040: A Clue","v05/c040"],
  ["Vol.05 Ch.041: Progression","v05/c041"],
  ["Vol.05 Ch.042: One Breaker","v05/c042"],
  ["Vol.05 Ch.043: The Skill To Win","v05/c043"],
  ["Vol.06 Ch.044: Influence","v06/c044"],
  ["Vol.06 Ch.045: The Judgement","v06/c045"],
  ["Vol.06 Ch.046: The Strongest","v06/c046"],
  ["Vol.06 Ch.047: What Would You Do?","v06/c047"],
  ["Vol.06 Ch.048: A Dangerous Person","v06/c048"],
  ["Vol.06 Ch.049: The Clincher","v06/c049"],
  ["Vol.06 Ch.050: The Beginning","v06/c050"],
  ["Vol.06 Ch.051: An Asset","v06/c051"],
  ["Vol.06 Ch.052","v06/c052"]
);

var total_chapters = 53;

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]);
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}
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;