# File lib/amazon/shoppingcart.rb, line 206
    def add_items(asin_list, quantity)

      check_minimum_quantity(quantity, 1)

      url = AWS_PREFIX + "?ShoppingCart=add&f=xml&dev-t=%s&t=%s&sims=true"
      url = url % [@token, @id]

      asin_list = [asin_list] if asin_list.is_a? String

      asin_list.each { |asin| url << "&Asin.%s=%s" % [asin, quantity] }

      # FIXME: add exchange items with &ExchangeId.[EXCHANGE_ID]=1

      url = check_cart(url)

      @page = search(url)
      parse
    end