def html_parse_hash(headers, size, headers_size)
        headers_index = headers.find_index { |x| x.count == headers_size }
        order = headers[headers_index]
        order_index = order.count - size
        order = order[order_index..-1]
        indice = headers[headers_index+1..-1].flatten
        indice = nil if indice.to_a.empty?
        [order, indice]
      end
Splits headers (all th tags) into order and index. Wherein,
Order : All <th> tags on first proper row of HTML table
index : All <th> tags on first proper column of HTML table