# File lib/nicovideo/page.rb, line 41
    def register_getter(params)
      params.each {|p|
        p_noq = p.sub(/\?$/,'')
        eval "@\#{p_noq} = nil\ndef \#{p}\nif @\#{p_noq}.nil?\n@page ||= get_page(@url)\nend\n@\#{p_noq}\nend\n"
      }
    end