# File lib/nicovideo/search.rb, line 25
    def url
      url = "#{BASE_URL}/#{@search_type}/#{@keyword}"
      url += '?' if (@sort || @order || @pagenum)
      url += '&sort='  + @sort  if @sort
      url += '&order=' + @order if @order
      url += '&page=' + @pagenum.to_s if @pagenum
      url
    end