def payu_hidden_fields(transaction)
      html = ""

      %w(pos_id pos_auth_key pay_type session_id amount amount_netto desc
      order_id desc2 trsDesc first_name last_name street street_hn
      street_an city post_code country email phone language client_ip
      js payback_login sig ts
      ).each do |field|
        value = transaction.send(field)
        html << hidden_field_tag(field, value) unless value.blank?
      end

      html.html_safe
    end
def payu_hidden_fields(transaction)
      html = ""

      %w(pos_id pos_auth_key pay_type session_id amount amount_netto desc
      order_id desc2 trsDesc first_name last_name street street_hn
      street_an city post_code country email phone language client_ip
      js payback_login sig ts
      ).each do |field|
        value = transaction.send(field)
        html << hidden_field_tag(field, value) unless value.blank?
      end

      html.html_safe
    end
Generates form fields for specified transaction object