var chapter_list = new Array(
  ["Ch.000: [Delete]","c000"],
  ["Vol.01 Ch.001","v01/c001"],
  ["Vol.01 Ch.002","v01/c002"],
  ["Vol.01 Ch.003","v01/c003"],
  ["Vol.01 Ch.004","v01/c004"],
  ["Vol.01 Ch.005","v01/c005"],
  ["Vol.01 Ch.006","v01/c006"],
  ["Vol.01 Ch.007","v01/c007"],
  ["Vol.01 Ch.008","v01/c008"],
  ["Vol.01 Ch.009","v01/c009"],
  ["Vol.01 Ch.010","v01/c010"],
  ["Vol.01 Ch.011","v01/c011"],
  ["Vol.01 Ch.012","v01/c012"],
  ["Vol.02 Ch.013","v02/c013"],
  ["Vol.02 Ch.014","v02/c014"],
  ["Vol.02 Ch.015","v02/c015"],
  ["Vol.02 Ch.016","v02/c016"],
  ["Vol.02 Ch.017","v02/c017"],
  ["Vol.02 Ch.018","v02/c018"],
  ["Vol.02 Ch.019","v02/c019"],
  ["Vol.02 Ch.020","v02/c020"],
  ["Vol.03 Ch.014","v03/c014"],
  ["Vol.03 Ch.015","v03/c015"],
  ["Vol.03 Ch.016","v03/c016"],
  ["Vol.03 Ch.017","v03/c017"],
  ["Vol.03 Ch.018","v03/c018"],
  ["Vol.03 Ch.019","v03/c019"],
  ["Vol.03 Ch.020","v03/c020"],
  ["Vol.04 Ch.021","v04/c021"],
  ["Vol.04 Ch.022","v04/c022"],
  ["Vol.04 Ch.023","v04/c023"],
  ["Vol.04 Ch.024","v04/c024"],
  ["Vol.04 Ch.025","v04/c025"],
  ["Vol.04 Ch.026: plus extra","v04/c026"],
  ["Vol.05 Ch.027","v05/c027"],
  ["Vol.05 Ch.028","v05/c028"],
  ["Vol.05 Ch.029","v05/c029"],
  ["Vol.05 Ch.030","v05/c030"],
  ["Vol.05 Ch.031","v05/c031"],
  ["Vol.05 Ch.032","v05/c032"],
  ["Vol.06 Ch.033","v06/c033"],
  ["Vol.06 Ch.034","v06/c034"],
  ["Vol.06 Ch.035","v06/c035"],
  ["Vol.06 Ch.036","v06/c036"],
  ["Vol.06 Ch.037","v06/c037"],
  ["Vol.06 Ch.038","v06/c038"],
  ["Vol.06 Ch.039","v06/c039"],
  ["Vol.06 Ch.040","v06/c040"],
  ["Vol.07 Ch.041","v07/c041"],
  ["Vol.07 Ch.042","v07/c042"],
  ["Vol.07 Ch.043","v07/c043"],
  ["Vol.08 Ch.098","v08/c098"],
  ["Vol.08 Ch.099","v08/c099"],
  ["Vol.08 Ch.100","v08/c100"],
  ["Vol.08 Ch.101","v08/c101"],
  ["Vol.09 Ch.102","v09/c102"],
  ["Vol.09 Ch.103","v09/c103"],
  ["Vol.09 Ch.104","v09/c104"],
  ["Vol.09 Ch.105: 105-106","v09/c105"],
  ["Vol.09 Ch.107","v09/c107"],
  ["Vol.09 Ch.108","v09/c108"],
  ["Vol.10 Ch.109","v10/c109"],
  ["Vol.10 Ch.110","v10/c110"],
  ["Vol.10 Ch.111","v10/c111"],
  ["Vol.10 Ch.112","v10/c112"],
  ["Vol.10 Ch.113","v10/c113"],
  ["Vol.10 Ch.114","v10/c114"],
  ["Vol.10 Ch.115","v10/c115"],
  ["Vol.10 Ch.116","v10/c116"],
  ["Vol.10 Ch.117","v10/c117"],
  ["Vol.10 Ch.118","v10/c118"],
  ["Vol.10 Ch.119","v10/c119"],
  ["Vol.10 Ch.120","v10/c120"],
  ["Vol.11 Ch.121","v11/c121"],
  ["Vol.11 Ch.122","v11/c122"],
  ["Vol.11 Ch.123","v11/c123"],
  ["Vol.11 Ch.124","v11/c124"],
  ["Vol.11 Ch.125","v11/c125"],
  ["Vol.11 Ch.126","v11/c126"],
  ["Vol.11 Ch.127","v11/c127"],
  ["Vol.11 Ch.128","v11/c128"],
  ["Vol.11 Ch.129","v11/c129"],
  ["Vol.11 Ch.130","v11/c130"],
  ["Vol.11 Ch.131","v11/c131"],
  ["Vol.11 Ch.132","v11/c132"],
  ["Vol.12 Ch.133","v12/c133"],
  ["Vol.12 Ch.134","v12/c134"],
  ["Vol.12 Ch.135","v12/c135"],
  ["Vol.12 Ch.136","v12/c136"],
  ["Vol.12 Ch.137","v12/c137"],
  ["Vol.12 Ch.138","v12/c138"],
  ["Vol.12 Ch.139","v12/c139"],
  ["Vol.12 Ch.140","v12/c140"],
  ["Vol.12 Ch.141","v12/c141"],
  ["Vol.12 Ch.142","v12/c142"],
  ["Vol.12 Ch.143","v12/c143"],
  ["Vol.12 Ch.144","v12/c144"],
  ["Vol.13 Ch.145","v13/c145"],
  ["Vol.13 Ch.146","v13/c146"],
  ["Vol.13 Ch.147","v13/c147"],
  ["Vol.13 Ch.148","v13/c148"],
  ["Vol.13 Ch.149","v13/c149"],
  ["Vol.13 Ch.150","v13/c150"],
  ["Vol.13 Ch.151","v13/c151"],
  ["Vol.13 Ch.152","v13/c152"],
  ["Vol.13 Ch.153","v13/c153"],
  ["Vol.13 Ch.154","v13/c154"],
  ["Vol.13 Ch.155","v13/c155"],
  ["Vol.13 Ch.156","v13/c156"],
  ["Vol.13 Ch.157","v13/c157"],
  ["Vol.14 Ch.158","v14/c158"],
  ["Vol.14 Ch.159","v14/c159"],
  ["Vol.14 Ch.160","v14/c160"],
  ["Vol.14 Ch.161","v14/c161"],
  ["Vol.14 Ch.162","v14/c162"],
  ["Vol.14 Ch.163","v14/c163"],
  ["Vol.14 Ch.164","v14/c164"],
  ["Vol.14 Ch.165","v14/c165"],
  ["Vol.14 Ch.166","v14/c166"],
  ["Vol.14 Ch.167","v14/c167"],
  ["Vol.14 Ch.168","v14/c168"],
  ["Vol.14 Ch.169","v14/c169"],
  ["Vol.14 Ch.170","v14/c170"],
  ["Vol.15 Ch.171","v15/c171"],
  ["Vol.15 Ch.172","v15/c172"],
  ["Vol.15 Ch.173","v15/c173"],
  ["Vol.15 Ch.174","v15/c174"],
  ["Vol.15 Ch.175","v15/c175"],
  ["Vol.15 Ch.176","v15/c176"],
  ["Vol.15 Ch.177","v15/c177"],
  ["Vol.15 Ch.178","v15/c178"],
  ["Vol.15 Ch.179","v15/c179"],
  ["Vol.15 Ch.180","v15/c180"],
  ["Vol.15 Ch.181","v15/c181"],
  ["Vol.15 Ch.182","v15/c182"],
  ["Vol.16 Ch.183","v16/c183"],
  ["Vol.16 Ch.184","v16/c184"],
  ["Vol.16 Ch.185","v16/c185"],
  ["Vol.16 Ch.186","v16/c186"],
  ["Vol.16 Ch.187","v16/c187"],
  ["Vol.16 Ch.188","v16/c188"],
  ["Vol.16 Ch.189","v16/c189"],
  ["Vol.16 Ch.190","v16/c190"],
  ["Vol.16 Ch.191","v16/c191"],
  ["Vol.16 Ch.192","v16/c192"],
  ["Vol.16 Ch.193","v16/c193"],
  ["Vol.17 Ch.194","v17/c194"],
  ["Vol.17 Ch.195","v17/c195"],
  ["Vol.17 Ch.196","v17/c196"],
  ["Vol.17 Ch.197","v17/c197"],
  ["Vol.17 Ch.198","v17/c198"],
  ["Vol.17 Ch.199","v17/c199"],
  ["Vol.17 Ch.200","v17/c200"],
  ["Vol.17 Ch.201","v17/c201"],
  ["Vol.17 Ch.202","v17/c202"],
  ["Vol.17 Ch.203","v17/c203"],
  ["Vol.17 Ch.204","v17/c204"],
  ["Vol.17 Ch.204.5","v17/c204.5"],
  ["Vol.17 Ch.205","v17/c205"],
  ["Vol.18 Ch.206","v18/c206"],
  ["Vol.18 Ch.207","v18/c207"],
  ["Vol.18 Ch.208","v18/c208"],
  ["Vol.18 Ch.209","v18/c209"],
  ["Vol.18 Ch.210","v18/c210"],
  ["Vol.18 Ch.211","v18/c211"],
  ["Vol.18 Ch.212","v18/c212"],
  ["Vol.19 Ch.213","v19/c213"]
);

var total_chapters = 167;

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;