Abstract: Web pages (5) prepared in a server contains Web pages that only a specific user is allowed to browse. When the server receives user authentication information for authenticating a specific user inputted by the specific user, a specific web page (13) in which a flag is buried is transmitted to the terminal of the user. When the specific user who has browsed the specific Web page (13) requests permission to browse another specific Web page, the server receives link information (31). Only when the flag (32) received along with the link information (31) is valid, the server transmits another specific Web page to the terminal. Thus, only when a specific user requests permission of browsing in compliance with the regular procedure, a Web page is transmitted to the user and the user is permitted to brows the Web page.

Abstract: ordering information is received by the server 3 through the network 1, when the order is placed by a user. The received data storage means 6 stores data with an external format 4 the server received. The received data format conversion means 7 converts data with an external format 4 stored in the received data storage means 6 to data with an internal format 5, and must be stored in the received process data storage means 8. The host computer 10 administrates the orders using the data with the internal format 5 stored in the received process data storage means.

Abstract: A Web page transmission section 4 transmits a Web page 10 with a quotation calculation program added thereto from a server 2. A data reception section 5 receives a quotation calculation result 11. When an analysis section 6 determines that the quotation calculation result is valid, a quotation issuing section 12 issues a formal quotation. In other cases, a quotation recalculation section 7 operates. A timer section 8 measures the period of time elapsed from transmission of the Web page 10 until a response to the transmission. As a result, an erroneous quotation is prevented from being issued even when the quotation calculation program in the Web page 10 has been tampered with.

Abstract: A storage device 5 stores a Web page template 11 defining the basic structure of Web pages to be browsed, and registered user information 12 including information regarding users who will browse the Web pages. Web page generating unit 6 generates, in response to a request from a user for browsing a Web page, generates a Web page specific to the user by embedding user-specific information which is obtained by referencing the registered user information 12 into the Web page template 11. A server unit 7 provides the generated user-specific Web page to the user.

Abstract: A Web page 10 that is transmitted from a server to a receiving terminal operated by a user displays selection lists 11 for selecting parts or the like by the user. Further, a starting button 12 for displaying a recommended plan is displayed on the Web page 10. By clicking the starting button 12, a selection pattern display program 18 is started. As a result, a result of selection of a predetermined pattern prepared beforehand by a Web page provider is displayed. Accordingly, the operation to select a recommended plan or a plan similar to the recommended plan can be simplified. Also, selection errors by the user can be prevented.

Abstract: The user transmits a display request 11 to designate contents of a Web page from a receiving terminal 3. A sever 2 has a Web page generation processing section 6 that selects a display control program 8 and data necessary for the operation of the display control program 8 from a storage section 5, and adds the same to a standard format Web page 7 that is prepared in advance. A new Web page 10 designated by the user is transmitted to the receiving terminal 3 through a network 1. Accordingly, a Web page containing the most current and minimum data necessary can be provided to the user, the user can use the received Web page to calculate estimates for desired products and so on.