// A function to find the total number of chapters, and list the chapters by name.
    function chapters($content)
    {
      $subArray = $this->returnSubStrings($content, "<TD ALIGN='RIGHT'>", "</select></TD></TR></TABLE>");
      $subStr = $subArray[0];
    
      $chapters[0] = substr_count($subStr, '<option  value') + 1;
    
      $X = 1;
      while($x <= $chapters)
      {
        $firstSub = ($x==1) ? "<option  value=".$x." selected>".$x.". " : "<option  value=".$x." >".$x.". ";
      
        $subArray = $this->returnSubStrings($subStr, $firstSub, "<option  value");
        $tempName = $subArray[0];
      
        $chapters[1][$x] = $tempName;
        
        $X++;
      }
      
      return $chapters;
    }