  <div style="clear: both;">&nbsp;</div>
  <span id="label_iso_8601"></span>
  <br><br>
  <h2>Custom</h2>
  <input type="checkbox" id="ck-0"
      onclick="allShowFixedNumWeeks(this.checked);" checked><label
      for="ck-0">ShowFixedNumWeeks</label><br>
  <input type="checkbox" id="ck-1"
      onclick="allShowOtherMonths(this.checked);" checked><label
      for="ck-1">ShowOtherMonths</label><br>
  <input type="checkbox" id="ck-2"
      onclick="allExtraWeekAtEnd(this.checked);" checked><label
      for="ck