Patent Publication Number: US-6910018-B1

Title: Purchase request approving apparatus, method, and storage medium storing same

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a purchase request approving apparatus and purchase request approving method for requesting purchase of articles. 
     Conventionally, companies and business offices purchase various articles necessary for daily business operations from external suppliers. 
     There are a variety of articles to be purchased. However, for example, purchases of articles such as stationery, for which purchase requests are issued in units of sections, are generally made according to the following procedure and get behind in office automation and paperless transactions. 
     A general clerk or the like issues a purchase slip for specifying a desired article. Next, a manager approves the issued slip by, e.g., sealing (signature). The approved slip is handed over to the procurement department. The procurement department puts a plurality of orders into a lot as needed, newly issues a purchase order slip, and sends it to an external supplier. With this procedure, the desired articles are delivered. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a purchase request approving apparatus and purchase request approving method capable of abolishing the conventional business procedures including preparation, issue, and transfer of physical purchase slips and efficiently inputting approval or rejection of a purchase-requested article. 
     In order to achieve the above object, a purchase request approving apparatus according to the present invention has the following arrangement. 
     There is provided a purchase request approving apparatus capable of approving a purchase request of a desired article, characterized by comprising display means for displaying information, which is stored in a database in advance, associated with articles for which approval of purchase is requested, and purchase approving means capable of storing, in the database, information representing approval or rejection of purchase of an article selected from the articles displayed by the display means. 
     The apparatus is characterized in that a requester capable of purchase request for the desired article belongs to a group based on predetermined common information, and the apparatus further comprises requester group setting means capable of setting a desired requester group different from the group of requesters for which approval or rejection of purchase is to be determined by the purchase approving means in accordance with the predetermined common information. 
     The apparatus is characterized in that the group of requesters is a section group in a company, and the predetermined common information is an identification code representing each section of the company. 
     The apparatus is characterized in that the display means is a browser of an internet, which is executed by the purchase request approving apparatus connected to a communication network, and the purchase approving means is constructed by a predetermined Web page displayed by the browser. 
     Further, the foregoing object is attained by providing a purchase request approving method of approving a purchase request of a desired article using a computer, characterized by comprising a display step of displaying information, which is stored in a database in advance, associated with articles for which approval of purchase is requested and a purchase approving step of storing, in the database, information representing approval or rejection of purchase of an article selected from the articles displayed in the display step. 
     Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view showing the overall arrangement of a purchase request system according to an embodiment of the present invention; 
         FIG. 2  is a block diagram of a personal computer which can be used as a client computer in the embodiment of the present invention; 
         FIG. 3  is a view showing the system configuration of software executed by the A/S of the purchase request system according to the embodiment of the present invention; 
         FIG. 4  is a view showing the system configuration of software executed by the A/S of the purchase request system according to the embodiment of the present invention; 
         FIG. 5  is a view showing the system configuration of software executed by the A/S of the purchase request system according to the embodiment of the present invention; 
         FIG. 6  is a view for explaining symbols used in  FIGS. 3  to  5 ; 
         FIG. 7  is a view showing a mailer window displayed when approval request mail is sent to the approver by the mailer function of the purchase request system according to the embodiment of the present invention; 
         FIG. 8  is a view showing a mailer window displayed when mail replying to the approval request is sent to the requester by the mailer function of the purchase request system according to the embodiment of the present invention; 
         FIG. 9  is a view showing a login window in the purchase request system according to the embodiment of the present invention; 
         FIG. 10  is a view showing a user information registration/change window in the purchase request system according to the embodiment of the present invention; 
         FIG. 11  is a view showing a request state display window in the purchase request system according to the embodiment of the present invention; 
         FIG. 12  is a view showing the dialogue box for designating search conditions and display form in the request state display window; 
         FIG. 13  is a view showing icon images indicating the number of purchase-requested articles in the embodiment of the present invention; 
         FIG. 14  is a view showing the catalog search window of the purchase request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 15  is a view showing the catalog list window of the purchase request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 16  is a view showing the individual input window of the purchase request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 17  is a view showing the requested article selection list window of the purchase request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 18  is a view showing the detail information input window for a many-item request of the purchase request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 19  is a view showing a state wherein the approval request window for a many-item request is displayed together with the detail information input window by the approval request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 20  is a view showing a state wherein the approval request window for a one-item request is displayed together with the detail information input window by the approval request processing function of the purchase request system according to the embodiment of the present invention; 
         FIG. 21  is a view showing conditions of cross-check executed by a client in inputting data to the detail information input window in the purchase request system according to the embodiment of the present invention; 
         FIG. 22  is a view showing the error window displayed when the desired due date of delivery input in the detail information input window has an error in the purchase request system according to the embodiment of the present invention; 
         FIG. 23  is a view showing the acceptance result list window displayed by the acceptance result display function in the purchase request system according to the embodiment of the present invention; 
         FIG. 24  is a view showing the approval request list window displayed by the approval processing function in the purchase request system according to the embodiment of the present invention; 
         FIG. 25  is a view showing the approval processing window of the approval processing function in the purchase request system according to the embodiment of the present invention; 
         FIG. 26  is a view showing the rejection processing window of the approval processing function in the purchase request system according to the embodiment of the present invention; 
         FIG. 27  is a view showing the temporary worker list window of the temporary worker management function in the purchase request system according to the embodiment of the present invention; 
         FIG. 28  is a view showing the temporary worker registration window of the temporary worker management function in the purchase request system according to the embodiment of the present invention; 
         FIG. 29  is a view showing the temporary worker deletion window of the temporary worker management function in the purchase request system according to the embodiment of the present invention; 
         FIG. 30  is a flow chart of software executed by each client in the purchase request system according to the embodiment of the present invention; 
         FIG. 31  is a flow chart showing the outline of processing executed by the A/S of the purchase request system according to the embodiment of the present invention; 
         FIG. 32  is a flow chart showing the outline of processing executed by the A/S of the purchase request system according to the embodiment of the present invention; and 
         FIG. 33  is a flow chart showing window display processing common to modules executed by the A/S of the purchase request system according to the embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. 
     [Hardware Configuration of System] 
     The overall hardware configuration of a purchase request system of this embodiment will be described first. 
       FIG. 1  is a view showing the overall arrangement of the purchase request system according to the embodiment of the present invention. 
     Referring to  FIG. 1 , reference numeral  30  denotes a communication line as a LAN (Local Area Network) or WAN (Wide Area Network);  1 , a plurality of client computers (to be referred to as clients hereinafter);  1 A, a client for a system manager for maintaining and managing the system; and  2 , an application server computer (to be referred to as an A/S hereinafter) for realizing a purchase request function (to be described later) and the like. 
     A Web server computer (to be referred to as a W/S hereinafter)  3  provides a so-called intranet environment in accordance with general software for realizing, e.g., the WWW (World Wide Web) function in a client-server system constituted by the plurality of clients  1  (including the client  1 A) and A/S  2 . A mail server computer (to be referred to as an M/S hereinafter)  4  controls/manages electronic mail transmission/reception between the clients in accordance with general mail management function (mailer) software. A database (D/B)  5  systematically stores various data associated with the purchase request system on the communication line  30 . 
     Personnel data  7  is used in this purchase request system, which is included in various personnel data stored by an external system (to be referred to as a personnel information management system hereinafter) for systematically managing the personnel information of a company to which the users of the clients  1  and  1 A belong. The personnel data  7  correlates at least the names, employee numbers, and positions of employees with each other in advance. The system manager for maintaining and managing the client  1 A copies the personnel data  7  as identification (ID) information of users (employees) who can use the purchase request function (to be described later) in the clients  1  to a portable storage medium  8  such as a floppy disk and downloads the copy data from, e.g., the client  1 A to the D/B  5 . 
     The storage medium  8  is used to copy the personnel data  7  because a number of personal information of the employees are generally stored in the personnel information management system. As far as a sufficient security guarantee function can be realized between the personnel data  7  and the purchase request system, the personnel data  7  may be downloaded through the communication line periodically and/or irregularly, or the master information of the personnel data  7  in the personnel information management system may be accessed when each client  1  logs in to the A/S  2 . 
     In this purchase request system, a plurality of W/Ss  3  are connected through a leased line and/or public line  31 . With this arrangement, the same intranet environment as that for the clients  1  can be provided to clients connected to a communication line (not shown; LAN or WAN) in another business office. 
     Data associated with articles to be purchased, which is stored in the D/B  5  by the purchase request function (to be described later), is appropriately updated between the D/B  5  and a database  6  prepared in another system used to actually order the articles to external suppliers. The database  6  is included in, e.g., an article ordering system managed and used by the procurement department in the company (business office). On the basis of the data of articles to be purchased, which is reflected to the database  6 , the article ordering system puts an article whose purchase quantity is large into a desired lot and actually orders the article to an external supplier. To actually order an article, the general EDI (Electronic Data Interchange) function is used, or an actual slip is issued as needed. A detailed description thereof will be omitted in this application. The purchase request system may incorporate the function of the article ordering system. 
     If the company (business office) has no procurement department, and individual users who have requested to purchase articles can manage the article order, articles for which purchase is approved by approval processing (to be described later) may be directly ordered by the purchase request system. 
     In this embodiment, the purchase request system is realized on the intranet shown in FIG.  1 . However, the present invention is not limited to this. If security of data to be transmitted/received can be ensured, the communication line  30  may be connected to a so-called Internet provider in place of some W/Ss  3  to allow a personal computer at a remote site as the client  1 . 
       FIG. 2  is a block diagram of a personal computer which can be used as a client computer in the embodiment of the present invention. The client computer corresponds to the client  1  ( 1 A) shown in FIG.  1 . 
     Referring to  FIG. 2 , reference numeral  22  denotes a display  22  such as a CRT;  23 , a keyboard as an input means;  24 , a ROM which stores a boot program and the like; and  25 , a RAM for temporarily storing various processing results. A storage unit  26  such as a hard disk drive (HDD) stores a general browser program that realizes access to a site (information resource) of a desired URL (Uniform Resource Locator) and browsing and/or acquisition of information of the accessed site. A communication interface  27  communicates with external apparatuses such as the above-described servers through the communication line  30  (LAN or WAN) in accordance with a protocol such as the TCP/IP (Transmission Control Protocol/Internet Protocol) or HTTP (HyperText Transfer Protocol) as an upper layer of TCP/IP. Reference numeral  28  denotes a pointing device such as a mouse. These units are connected via an internal bus  29 . A CPU  21  controls the entire client computer  1  ( 1 A) in accordance with the program stored in the storage unit  26 . 
     For each of the server computers such as the A/S  2 , W/Ss  3 , and M/S  4  as well, the display  22 , keyboard  23 , and pointing device  28  are prepared as needed. The basic hardware configuration of each server is substantially the same as that of the block diagram in FIG.  2 . However, when accurate data processing by the servers and restoration of stored data are taken into consideration, hardware that duplicates the CPU  21  and storage unit  26  is employed. In this embodiment, separate servers are used in accordance with the function realized by each server. However, the present invention is not limited to this. As long as the data processing capability is sufficient, for example, the A/S  2  and M/S  4  may be realized by single hardware. 
     [Software Configuration of System] 
     The purchase request function realized by the system of the above-described embodiment will be described next. In the following description, the user (e.g., a general clerk) of the client  1  for requesting to purchase an article is called a “requester”, and the user (e.g., a manager with a rank equal to or higher than a section manager) of the client  1  for determining approval or rejection of the purchase request for the article is called an “approver”. 
     The purchase request system according to this embodiment will be briefly described. This system has a function with which the requester specifies (selects) a desired article prior to actual order of the article to be purchased by the external article ordering system shown in  FIG. 1 , a function as a purchase request apparatus for requesting the approver to approve purchase of the specified article, and a function as a purchase request approving apparatus with which the approver determines approval or rejection of purchase of the approval-requested article in a client-server environment where a plurality of clients are connected on a communication network (details will be described later). A user logs in to this system as a requester or approver in accordance with the user (employee) ID from a predetermined Web page displayed on the client  1 . When the user logs in as an approver, he/she can also use the article specifying function and approval request function. This arrangement allows abolition of the conventional business procedures including preparation, issue, and transfer of physical purchase slips and office automation (OA) in purchasing various articles to be used in business offices. 
     These functions are realized when the A/S  2  executes the module group of software constructing the system shown in  FIGS. 3  to  5  and stored in the A/S  2  in advance, and the client  1  executes the software shown in the flow chart of  FIG. 30  as basic software for displaying windows (to be described later) shown in  FIGS. 9  to  29  on the display  22  of the client  1 . Each client  1  and A/S  2  communicate using the above-described intranet environment by the W/Ss  3 . 
     The purchase request system uses an automatic mail function provided by the above-described M/S  4  when the requester notifies the approver of an approval request ( FIG. 7 ) or the approver notifies the requester of an approval result ( FIG. 8 ) (details will be described later). 
     Software Executed in Client  1   
     Software executed in the client  1  will be described. 
       FIG. 30  is a flow chart of software executed by each client in the purchase request system according to the embodiment of the present invention. In this case, a user logs in to the purchase request system as a requester. 
     The storage unit  26  of the client  1  stores a browser program in advance, as described above. First, the user of the client  1 , who will log in to the purchase request system as a requester, starts the browser in accordance with a predetermined procedure so as to make the client of his/her own link to the purchase request system executed by the CPU of the A/S  2  (more specifically, the browser program in the storage unit  26  is loaded in the RAM  25 , and the CPU  21  executes the loaded program). Simultaneously, the user inputs predetermined URL to a predetermined area of the started browser. When the client is linked to the purchase request system through the W/S  3 , the CPU  21  of the client  1  starts processing from step S 1 . 
     In this embodiment, the program of the cross-check function from step S 3  to step S 5  is directly described in the file of a Web page described in the HTML as a tag of the JavaScript. The cross-check function can be executed by each client  1 . When the A/S  2  executes the cross-check function, transmission of data input from keys and transmission of data representing that the transmitted data is inappropriate are necessary as communication between the client  1  and A/S  2 . However, when the cross-check function is executed by the client  1 , the transmission can be omitted, and therefore, the waiting time of the user of the client  1  can be made shorter than that when the A/S  2  executes the cross-check function. 
     Since the program of the cross-check function is described as a tag of the JavaScript, every time a Web page described in the HTML is displayed, the client  1  can acquire the program of the cross-check function from the A/S  2  together with data (to be referred to as display window data hereinafter) representing the layout of the displayed window. In addition, a program of old version can be prevented from remaining in the storage unit  26  of the client  1 . This arrangement facilitates systematic management of the program of the cross-check function in the A/S  2 . 
     Step S 1 : The RAM  25  receives the display window data of a home page (HP) and the like from the site (A/S  2 ) at the link destination through the communication interface  27 . In this embodiment, the general HTML (HyperText Markup Language) is employed as the description language of a Web page. 
     Step S 2 : A window is displayed on the display  22  in accordance with the display window data received from the A/S  2  and D/B  5  and data embedded in the display window. 
     Step S 3 : It is detected whether key input of a numerical value or the like from the keyboard  23  or pointing operation using the pointing device  28  is performed. 
     Step S 4 : If YES in step S 3  (the input operation is detected), it is determined whether a predetermined data input item is input in the window displayed on the display  22 . If NO in step S 4  (no predetermined data input item is input), the flow advances to step S 7 . 
     Step S 5 : If YES in step S 4  (the predetermined data input item is input), it is determined whether the input data detected in step S 3  satisfies a predetermined cross-check condition. If YES in step S 5 , the flow advances to step S 7 . 
     Specific examples of the predetermined data input item and predetermined cross-check condition will be described later with reference to  FIGS. 20 and 21 . 
     Step S 6 : If NO in step S 5  (the condition is not satisfied), a predetermined alarm message is displayed on the display  22  in accordance with the determination result (error) in step S 5 , and the flow returns to step S 3 . 
     Step S 7 : The input data detected in step S 3  or data corresponding to the pointing operation is transmitted to the A/S  2  via the communication interface  27 . 
     Step S 8 : It is determined whether a predetermined input operation for instructing to end the browser is performed. If NO in step S 8  (no end instruction is input), the flow returns to step S 2 . If YES in step S 8  (the end instruction is input), the browser program is ended, and the area of the RAM  25  where the program has resided is released. 
     In this embodiment, the program of the cross-check function is described as a tag of the JavaScript. If the system environment allows easy version management of programs stored in the storage unit  26  of each client  1 , the program of the cross-check function which is compiled to the execution form in advance may be stored in the A/S  2 . When a Web page described in the HTML is to be displayed on the client  1  for the first time, the program in the execution form may be downloaded to the client  1  in accordance with the tag of the Java applet contained in the file in advance. 
     Software Executed by A/S  2   
     Software executed by the CPU of the A/S  2  will be described next. First, the outline of the module group of the software constructing the system shown in  FIGS. 3  to  5  will be described with reference to the flow charts shown in  FIGS. 31 and 32 . Next, window display processing common to the modules will be described with reference to the flow chart shown in FIG.  32 . Finally, the functions of the modules shown in  FIGS. 3  to  5  will be described with reference to windows shown in  FIGS. 9  to  29  (including FIGS.  7  and  8 ). 
     (1) Outline of Software Module Group of A/S  2   
       FIGS. 3  to  5  are views showing the system configuration of software executed by the A/S of the purchase request system according to the embodiment of the present invention.  FIG. 6  is a view for explaining symbols used in  FIGS. 3  to  5 . 
     The software module group (to be referred to as modules hereinafter) executed by the A/S  2  comprises eight modules of login ( 01 ), request state display processing ( 02 ), purchase request processing ( 03 ), correction input processing ( 04 ), approval request processing ( 05 ), acceptance result display processing ( 06 ), approval processing ( 07 ), and temporary worker management processing ( 08 ), as shown in  FIGS. 3  to  5 . These modules have a function of displaying various windows (to be described later) on the display  22  of the client  1  and realizing an input operation in the displayed window. Transition between the modules and window display in each module can be done as indicated by arrows and broken lines in  FIGS. 3  to  5 . 
     A numeral (**-**-**) in each block representing a top window or a window belonging to the top window is a window number. A top window is displayed first when the function to be used by the user of the client  1  is changed by a predetermined operation in the window (to be described later). 
       FIGS. 31 and 32  are flow charts showing the outline of processing executed by the A/S of the purchase request system according to the embodiment of the present invention. 
     Step S 11 : It is determined whether the client  1  logs in through the W/S  3 . The client  1  logs in from a predetermined HP displayed on the display  22  of the client, as described with reference to FIG.  30 . 
     Steps S 12  and S 13 : When a user ID (including a password from the second login) is received in step S 11 , the personnel data  7  (including a password group registered in the D/B  5  from the second login) stored in the D/B  5  in advance is referred to (step S 12 ) to determine whether the received user ID is an approver (step S 13 ). If YES in step S 13  (the login user is an approver), the flow advances to step S 31  in FIG.  32 . 
     Step S 14 : If NO in step S 13  (the login user is a requester), request state display processing ( 02 ) is performed. At this time, transition to correction input processing ( 04 ) is possible. 
     Step S 15 : It is detected whether start request data for another module different from the module that is being currently executed is received from the login client  1  through the W/S  3 . If NO (the data is not received), the flow advances to step S 21 . 
     Step S 16 : If YES in step S 15  (the start request data is received), processing of the module that is being executed is stopped. 
     Steps S 17  and S 18 : It is determined whether the start request data received in step S 15  represents purchase request processing (step S 17 ). If YES in step S 17 , purchase request processing is executed (step S 18 ). At this time, transition to approval request processing ( 05 ) is possible. 
     Steps S 19  and S 20 : If NO in step S 17 , it is determined whether the start request data received in step S 15  represents acceptance result display processing (step S 19 ). If YES in step S 19 , acceptance result display processing is executed (step S 20 ). 
     Step S 21 : It is detected whether data representing the end of use of this system is received from the login client  1  via the W/S  3 . If NO in step S 21  (the data is not received), the flow returns to step S 15 . 
     Step S 43 : If YES in step S 21  (the data representing the end of use is received), processing of the module that is being executed is stopped. 
     Step S 31 : When it is determined in step S 13  that the login user is an approver, approval processing ( 07 ) is performed. 
     Step S 32 : It is detected whether start request data for another module different from the module that is being currently executed is received from the login client  1  through the W/S  3 . If NO (the data is not received), the flow advances to step S 42 . 
     Step S 33 : If YES in step S 32  (the start request data is received), processing of the module that is being executed is stopped. 
     Steps S 34  and S 35 : It is determined whether the start request data received in step S 32  represents request state display processing ( 02 ) (step S 34 ). If YES in step S 34 , request state display processing ( 02 ) is executed (step S 35 ). At this time, transition to correction input processing ( 04 ) is possible. 
     Steps S 36  and S 37 : If NO in step S 34 , it is determined whether the start request data received in step S 32  represents purchase request processing ( 03 ) (step S 36 ). If YES in step S 36 , purchase request processing ( 03 ) is executed (step S 37 ). At this time, transition to approval request processing ( 05 ) is possible. 
     Steps S 38  and S 39 : If NO in step S 36 , it is determined whether the start request data received in step S 32  represents acceptance result display processing ( 06 ) (step S 38 ). If YES in step S 38 , acceptance result display processing ( 06 ) is executed (step S 39 ). 
     Steps S 40  and S 41 : If NO in step S 38 , it is determined whether the start request data received in step S 32  represents temporary worker management processing ( 08 ) (step S 40 ). If YES in step S 40 , temporary worker management processing ( 08 ) is executed (step S 41 ). On the other hand, if NO in step S 40 , the flow returns to step S 32 . 
     Step S 42 : It is detected whether data representing the end of use of this system is received from the login client  1  via the W/S  3 . If NO in step S 42  (the data is not received), the flow returns to step S 32 . If YES in step S 42  (the data representing the end of use is received), the flow advances to step S 43 . 
     (2) Window Display Processing Common to Modules 
       FIG. 33  is a flow chart showing window display processing common to the modules executed by the A/S of the purchase request system according to the embodiment of the present invention. This processing is performed to display a window corresponding to the input operation by the user on the display  22  of the client  1  which is logging in the A/S  2 . This processing is started by the CPU of the A/S  2  when the function to be used by the user of the client  1  is changed by a predetermined operation in a window (to be described later). 
     Step S 101 : Data of each item necessary in the top window (i.e., top window corresponding to the function designated by a predetermined operation) to be displayed on the client  1  is read out from the D/B  5 . 
     In step S 102 : The display window data of the top window to be displayed and the data read out from the D/B  5  in step S 101  are transmitted to the login client  1  via the W/S  3 . Upon receiving the display window data and the like via the communication interface  27 , the CPU  21  of the client  1  interprets the received display window data by the browser function which is currently being executed and displays the top window on the display  22  in accordance with the interpretation. 
     Step S 103 : It is detected whether data representing the end of use of this system is received. If YES in step S 103  (the data is received), processing is stopped. 
     Step S 104 : If NO in step S 103  (the data is not received), it is determined whether data representing that a software button (to be referred to as a button hereinafter) (including an icon) is depressed (clicked) on the window currently displayed on the client  1  is received through the W/S  3 . If NO in step S 104  (the data is not received), the flow returns to step S 103 . 
     Step S 105 : If YES in step S 103  (the data is received), it is determined whether the button is a button for selecting another function different from the function that can be used by the user on the currently displayed window. If YES in step S 105  (another function button is clicked), the flow returns to step S 101 . If NO in step S 105  (another function button is not clicked), the flow advances to step S 107 . 
     Step S 106 : If NO in step S 103  (the data is not received), data received via the W/S  3  in accordance with the input operation by the user on the window which is currently being displayed on the client  1  is written (including update) in the D/B  5  and/or new data is read out from the D/B  5 . 
     Step S 107 : The data read out in step S 106  and display window data representing a window for displaying the data are transmitted to the login client  1  via the W/S  3 , as needed, and the flow returns to step S 103 . Upon receiving the display window data and the like, as in step S 102 , the CPU  21  of the client  1  displays a window belonging to the currently displayed top window or a new window on part of the currently displayed window. 
     (3) Description of Function of Each Window 
     The detailed functions of the modules constructing the system shown in  FIGS. 3  to  5  will be described below with reference to main windows ( FIGS. 9  to  29 ) which can be displayed on the display  22  of the client  1 . 
     Login ( 01 ) Module 
       FIG. 9  is a view showing a login window in the purchase request system according to the embodiment of the present invention. 
     A login window  01 - 01 - 00  shown in  FIG. 9  can be opened from a predetermined HP displayed on the client  1  by the above-described procedure (although details will be described later, the login window can be opened even by using the mailer function to be described later with reference to FIGS.  7  and  8 ). 
     In this login window, the user inputs predetermined data in the columns of personal name (user ID) and password. When the “login” button is clicked, the input data are transmitted to the A/S  2 . The A/S  2  determines whether the user himself/herself logs in and whether the user is a requester or approver, on the basis of the user ID and password input as described above. In accordance with the determination result, the A/S  2  determines a top window which can transit to another window. When the “reset” button is clicked, input to the columns of personal name and password can be reset (the “reset” buttons in other windows have the same function as described above, and a detailed description thereof will be omitted). When “end” button is clicked, data representing the end of use of this system is transmitted to the A/S  2  (the “end” buttons in other windows have the same function as described above, and a detailed description thereof will be omitted). When the “user information register/change” button is clicked, the window shown in  FIG. 10  is displayed. 
       FIG. 10  is a view showing the user information registration/change window in the purchase request system according to the embodiment of the present invention. 
     In a user information registration/change window  01 - 02 - 01  (when the user is a requester) shown in  FIG. 10 , a change in password, e-mail address, and extension number in the business office are input. The e-mail address is input to realize approval request notification from the requester to the approver ( FIG. 7 ) and approval result notification from the approver to the requester ( FIG. 8 ) (both will be described later). The user who has completely input these items in this window clicks the “register/update” button (the “register/update” buttons in other windows have the same function as described above, and a detailed description thereof will be omitted). The input data are transmitted to the A/S  2 . When “return” button is clicked, a window as an upper layer of the currently displayed window is displayed (the return buttons in other windows have the same function as described above, and a detailed description thereof will be omitted). In this case, the login window  01 - 01 - 00  in  FIG. 9  is displayed again. 
     The dialogue box on the lower side of the broken line in the window shown in  FIG. 10  is displayed to set a target approval section only when the login user is an approver. In this case, the window number is  01 - 02 - 02 . In this dialogue box, the login user as an approver can change (add or delete) by himself/herself the sections (groups of requesters) in his/her charge in approving purchase requests. More specifically, to add a target section, the approver inputs the code of the section to the column of post code and clicks the “register” button. To delete a target section, he/she selects the section to be deleted from the list of current target sections and clicks the “delete” button. With this function, an approver can temporarily approve purchase requests from a section not in his/her charge by proxy for the original approver of the section due to some reason, so a more practical system can be realized. 
     Request State Display Processing Module ( 02 ) and Correction Input Processing Module ( 04 ) 
       FIG. 11  is a view showing a request state display window in the purchase request system according to the embodiment of the present invention. This window is displayed first after login is complete when the user is a requester.  FIG. 12  is a view showing the dialogue box for designating search conditions and display form in the request state display window. 
     In a request state display window  02 - 01 - 01 , the list of article purchase request statuses is displayed in accordance with conditions designated in the dialogue box for designating the search conditions and display form shown in FIG.  12 . The displayed data are data read out from the D/B  5 . 
     Buttons at the upper portion of the request state display window  02 - 01 - 01  shown in  FIG. 11  will be described. 
     On the “n articles selected” button, the number (number of types) of articles purchase-requested by the purchase request function realized by the purchase request processing module ( 03 ) (to be described later) is displayed. When this button is clicked, a requested article selection list window  03 - 03 - 00  shown in  FIG. 17  is displayed to set the purchase quantity of the n articles. The “n articles selected” button may have a shape of, e.g., a shopping basket as shown in  FIG. 13 , on which the number of purchase-requested articles is displayed. 
     When the “purchase request” button is clicked, a catalog search window  03 - 01 - 00  shown in  FIG. 14 , which is realized by the purchase request processing module ( 03 ), is displayed. 
     When the “acceptance result” button is clicked, an acceptance result list window  06 - 01 - 00  shown in  FIG. 23 , which is realized by the acceptance result display processing ( 06 ), is displayed. 
     When the “?” button at the upper portion of the request state display window  02 - 01 - 01  is clicked, to display text data for explaining the function, which is stored in the D/B  5  in advance, a program for transmitting the data to the client  1  is executed by the A/S  2  (the “?” buttons in other windows have the same function as described above, and a detailed description thereof will be omitted). 
     The plurality of buttons in the upper region of the above-described window or another window to be described below are actually displayed with any one of the buttons kept clicked in accordance with the displayed window. For the illustrative convenience, the button kept clicked in this region is indicated by a bold frame for discrimination from unclicked buttons. 
     In the dialogue box for designating search conditions and display form shown in  FIG. 12 , search conditions and display form can be designated. 
     As the search conditions to be designated, input of the section code of the request source or expense payer, the personal name code of the requester or approver, the article request number, and the state of an article to be searched for (withdrawal, rejection, registration, and the like) can be designated. 
     As the display form, the number of data to be displayed in one page can be designated in the column of list display count. In addition, a status window (request state display window  02 - 01 - 01  shown in  FIG. 11 ) for mainly displaying the current status information of the individual articles or an expense window (window  02 - 01 - 02  which is not shown) for mainly displaying the expense information of individual articles can be selected. 
     After the search conditions and display form are designated, the “search” button is clicked. With this operation, a request state display window according to the designated conditions is displayed on the display  22  of the client  1 . 
     In the list of purchase request statuses of the request state display window  02 - 01 - 01 , the selection button, message, state (status), request number, requester name, article name, request quantity, estimated amount, desired due date of delivery, due date of order, date of registration, date of request, date of approval, date of reception, date of order, date of delivery, date of acceptance, order quantity, delivery quantity, acceptance quantity, date of completion of order, delay answer (text), and approver name can be displayed. This will be described below in more detail. 
     Selection button: This button is clicked to select an article with a certain request number. 
     Message: ● is displayed in this column when a message for the requester or approver is present. 
     State (status): As the current state of an article with a certain request number, the A/S  2  selects one of “registered”, “wait for approval”, “approved”, “rejected”, and “withdrawn, (details will be described later) in accordance with operation in the window displayed by purchase request processing ( 03 ), approval request processing ( 05 ), and approval processing ( 07 ) (to be described later). 
     Request number: The reference number of an article in this purchase request system. The reference number is issued by the A/S  2 . 
     Requester name: The name of a requester who has requested to purchase an article with a certain request number. The name is selected from the personnel data  7  by the A/S  2  in accordance with the user ID. 
     Article name: The name of a purchase-requested article. The article name is selected from the D/B  5  by the A/S  2 . 
     Request quantity: The quantity of a purchase-requested article. This data is input by the requester. 
     Estimated amount: The estimated price (or actual sales price) of a purchase-requested article. The amount is selected from the D/B  5  by the A/S  2 . 
     Desired due date of delivery: The date of delivery desired by the requester of a purchase-requested article. This data is input by the requester. 
     Due date of order: The actually expected due date set in actual order by the procurement department. 
     Date of registration: The date when the requester generates a purchase request and registers the data on the A/S  2  side for the first time. 
     Date of request: The date when approval of a purchase-requested and registered article is requested. This date is registered by the A/S  2  in accordance with an operation in the window displayed by approval request processing ( 05 ) (to be described later). 
     Date of approval: The date when an approval-requested article is approved by an approver. This date is registered by the A/S  2  in accordance with the operation of the approver in the window displayed by approval processing ( 07 ) (to be described later). 
     Date of reception: The date when a purchase-approved article is received by the procurement department. This date is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Date of order: The date when the procurement department has actually ordered an article for which reception is completed. This date is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Date of delivery: The date when an article with a certain request number is delivered. This date is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Date of acceptance: The date when a delivered article is accepted. This date is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Order quantity: The quantity of articles actually ordered by the procurement department. This quantity is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Delivery quantity: The delivery quantity of articles ordered by the procurement department. This quantity is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Acceptance quantity: The acceptance quantity of articles delivered. This quantity is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Date of completion of order: The date when the order by the procurement department is completed. This date is reflected from the D/B  6  of the article ordering system to the D/B  5 . 
     Delay answer (text): A comment associated with delay of the due date of delivery by the procurement department. This comment is input by a person in charge in the procurement department. 
     Approver name: The name of an approver who has approved purchase of an article with a certain request number. The name is registered by the A/S  2  in accordance with an operation by the approver in the window displayed by approval processing ( 07 ) (to be described later). 
     The statuses displayed in the column of state (status) will be described. 
     “Registered”: This status is set on the D/B  5  by the A/S  2  in the purchase request function realized by the purchase request processing module ( 03 ) (to be described later) when the requester inputs a predetermined item about a purchase-requested article and then performs a registration operation. 
     “Wait for approval”: This status is set on the D/B  5  by the A/S  2  in the approval request function realized by the approval request processing module ( 05 ) (to be described later) when an approval request for purchase is issued, and no determination is made yet by the approver. 
     “Approved”: This status is set on the D/B  5  by the A/S  2  in the approval processing function realized by the approval processing module ( 07 ) (to be described later) when the approver approves purchase of an article in the “wait for approval” state. The state of the approved article cannot be changed anymore. 
     “Rejected”: This status is set on the D/B  5  by the A/S  2  in the approval processing function realized by the approval processing module ( 07 ) (to be described later) when the approver does not approve purchase of an article in the “wait for approval” state and rejects it. 
     “Withdrawn”: This status is set on the D/B  5  by the A/S  2  when the requester withdraws the request in the request state display window  02 - 01 - 01  shown in  FIG. 11  before the approver determines approval or rejection of purchase of an article in the “wait for approval” state. 
     The functions of buttons in the middle of the request state display window  02 - 01 - 01  shown in  FIG. 11  will be described. 
     When the ore-load” button is clicked, the request state list is re-displayed on the basis of the current data in the D/B  5  on the basis of designation of current search conditions and display form. 
     After one or a plurality of articles are selected by clicking the column of selection (the same procedure as described above is used to select articles from another lists displayed on windows, and a detailed description thereof will be omitted), the “requester change” button is clicked. With this operation a requester change window  02 - 04 - 00  (not shown) in which the requester can be changed is displayed. 
     When one or a plurality of articles are selected, and then, the “approval request” button is clicked, an approval request window  05 - 01 - 00  ( 05 - 02 - 00 ) for the selected articles is displayed. 
     When one or a plurality of articles are selected, and the “correct” button is clicked, the input matters can be changed in windows  04 - 01 - 00 ,  04 - 02 - 00 , and  04 - 03 - 00  (none are shown) displayed by the function of the correction input processing module ( 04 ). The correction input function realized by the correction input processing module ( 04 ) can transit to the approval request function realized by the approval request processing module ( 05 ). 
     When one or a plurality of articles are selected, and the “withdraw” button is clicked, a withdrawal confirmation window  02 - 03 - 02  (not shown) is displayed. The requester can withdraw an article in the “wait for approval” state by inputting a predetermined operation in the displayed window. 
     When one or a plurality of articles are selected, and the “delete” button is clicked, a deletion confirmation window  02 - 03 - 01  (not shown) is displayed. When a predetermined operation is input in the displayed window, an article currently in the “withdrawn” or “registered” state can be deleted. 
     When the ▴ or ▾ mark is clicked in the purchase request status list, the display order of the list can be rearranged in the ascending or descending order by a general method. 
     The request state display module ( 02 ) can display a details confirmation window  02 - 02 - 00  (not shown). In this window, detail information of a selected article can be confirmed. 
     Purchase Request Processing Module ( 03 ) and Approval Request Processing Module ( 05 ) 
       FIG. 14  is a view showing the catalog search window of the purchase request processing function of the purchase request system according to the embodiment of the present invention. 
     In a catalog search window  03 - 01 - 00 , the requester selects an article for which purchase is to be requested from catalog data stored in the D/B  5  in advance. In the catalog data, data such as the article name, type, maker, estimated amount (estimated purchase amount), and normal due date of delivery are registered and managed in units of articles by, e.g., the person in charge in the procurement department. 
     An article can be selected by keyword search or genre search. 
     In keyword search, a keyword or a chemical substance registration number is input, and the number of search results to be displayed in one page is set in the display count input column. When the “search” button is clicked, a catalog list window  03 - 02 - 00  according to the designated conditions is displayed on the display  22  of the client  1 . 
       FIG. 15  is a view showing the catalog list window of the purchase request processing function of the purchase request system according to the embodiment of the present invention. 
     In the catalog list window  03 - 02 - 00  shown in  FIG. 15 , the data of articles selected from the catalog data in the D/B  5  on the basis of the designated search conditions are displayed in a number corresponding to the display count n designated in the catalog search window  03 - 01 - 00 . When an article name is clicked, an article description window  03 - 04 - 02  (not shown) in which the description of the article is made is displayed. 
     The catalog list window  03 - 02 - 00  has the “many-item request” button and “one-item request” button. 
     More specifically, after one or more desired articles are clicked in the selection column of the catalog list window  03 - 02 - 00 , the “many-item request” button is clicked. With this operation, the number of types clicked is added to the “n articles selected”. When the user clicks the “n articles selected” button, a requested article selection list window  03 - 03 - 00  shown in  FIG. 17  is displayed. 
     When only one desired article is clicked in the selection column of the catalog list window  03 - 02 - 00 , and then, the “one-item request” button is clicked, a detail information input window  03 - 06 - 00  for a one-item request shown in  FIG. 20  is displayed. 
     The windows to be opened will be described later in detail. In “many-item request”, a plurality of types of articles desired are selected from the plurality of articles displayed in the catalog list window  03 - 02 - 00 , and approval requests for purchase of the selected plurality of articles are issued. In “one-item request”, only one desired article is selected from the plurality of articles displayed in the catalog list window  03 - 02 - 00 , and an rr approval request for purchase of the selected article is issued. 
     In genre search, from a pull-down menu displayed by clicking the “open” button (FIG.  14 ), item groups to which the desired article belongs are selected one by one in the order of genre  1 →genre  2 →genre  3 . When the “list display” button is clicked, a list of articles (catalog list window  03 - 02 - 00 ) corresponding to the item group selected in the genre is displayed. 
     When the “repeat” button ( FIG. 14 ) is clicked, of articles which belong to the item group selected in genre  1  and are accepted by the previous month, articles for which purchase requests are issued by “individual request” are displayed as a list in a repeat search window  03 - 08 - 00  (not shown). This window can conveniently transit to an individual input window  03 - 07 - 00  shown in  FIG. 16  when the desired article is not present in the displayed list. 
     The “individual request” button ( FIG. 14 ) is used when the desired article cannot be found from the catalog data in the D/B  5  by the above-described keyword search, genre search, and “repeat” function. When this button is clicked, the individual input window  03 - 07 - 00  shown in  FIG. 16  is displayed. 
       FIG. 16  is a view showing the individual input window of the purchase request processing function of the purchase request system according to the embodiment of the present invention. When purchase of an article unregistered on the catalog data in the D/B  5  is to be requested, detail information of the desired article can be input. 
     In the individual input window  03 - 07 - 00  shown in  FIG. 16 , necessary matters are input to the columns of the window. When a plurality of requesters are requesting purchase of an article unregistered in the catalog data, input data about the same article are transmitted from the plurality of requesters to the A/S  2 . The person in charge in the procurement department can easily recognize the necessity of the article on the basis of the number of input data about the same article. For this reason, the scale of buy in a mass (lot) for the next delivery and the unit price (expected unit price) for the buy in a mass can be accurately predicted. 
     When the necessary matters are completely input in the individual input window, and the “next” button is clicked, an article information (detail input) window  03 - 06 - 00  shown in  FIG. 20  is displayed. When the “select” button is clicked, the request is added as one of the plurality of requests, so the value n on the “n articles selected” button is incremented by one. When the “n articles selected” button is clicked, the requested article selection list window  03 - 03 - 00  shown in  FIG. 17  is displayed to set the purchase quantity of the n articles, as described above. 
       FIG. 17  is a view showing the requested article selection list window of the purchase request processing function of the purchase request system according to the embodiment of the present invention. 
     The requested article selection list window  03 - 03 - 00  shown in  FIG. 17  shows a case wherein three articles are selected in the catalog list window  03 - 02 - 00 . The purchase quantity of each of the selected articles can be input to the column of requested quantity. 
     The requested article selection list window  03 - 03 - 00  has the “many-item details input” button and “one-item details input” button. 
     More specifically, when two or more desired articles are clicked in the column of selection of the requested article selection list window  03 - 03 - 00 , and the “many-item details input” button is clicked, a detail information input window  03 - 05 - 00  for a many-item request shown in  FIG. 18  is displayed. 
     When only one desired article is clicked in the column of selection of the requested article selection list window  03 - 03 - 00 , and the “one-item details input” button is clicked, a detail information input window  03 - 06 - 00  for a one-item request shown in  FIG. 20  is displayed. 
       FIG. 18  is a view showing the detail information input window for a many-item request of the purchase request processing function of the purchase request system according to the embodiment of the present invention. 
     In the detail information input window  03 - 05 - 00  shown in  FIG. 18 , pieces of information including the expense payer, section code, accounts (account title), expense, facility budget code, desired due date of delivery, and delivery business office are input in association with purchase of the plurality of articles selected in the requested article selection list window  03 - 03 - 00 . 
     When the “account list” button is clicked, combinations of selectable account titles and expenses are displayed as a list. 
     In this embodiment, in inputting these items in this window (including the detail information input window  03 - 06 - 00  shown in FIG.  20 ), the cross-check function described above with reference to  FIG. 30  is executed by the CPU  21  of the client  1  to check the suitability of the format of input data to a predetermined item. 
       FIG. 21  is a view showing conditions of cross-check executed by the client in inputting data to the detail information input window in the purchase request system according to the embodiment of the present invention. 
     In the list of cross-check conditions shown in  FIG. 21 , conditions of an input format (e.g., the character string and/or numerical string to be used) to be satisfied by input data of a predetermined item such as the expense or facility budget code are determined on the basis of data input to the column of account (account title) of the detail information input window  03 - 05 - 00  as a key. The data of cross-check conditions are stored in the D/B  5  in advance. These data are stored in the RAM  25  of the client  1  when the display window data of an HP or the like is received in step S 1  of FIG.  30 . 
     When input to the plurality of items of the detail information input window  03 - 05 - 00  is ended, and the requester clicks the “register” button, the data input at this time point is transmitted to the A/S  2 . 
     Upon receiving the data of detail information, the A/S  2  compares the data of date input to the column of desired due date of delivery of the detail information input window with the calendar data for the company (business office), which is registered in the D/B  5  in advance, thereby determining whether the desired due date of delivery is the date of a holiday in the calendar data. 
     If it is determined that the desired due date of delivery is not the date of a holiday in the calendar data, the A/S  2  writes the data of detail information in the D/B  5 . 
     If the desired due date of delivery is the date of a holiday in the calendar data, the A/S  2  transmits predetermined display window data to the client  1  that has transmitted the data of detail information to display an error window  03 - 11 - 01  shown in FIG.  22 . 
       FIG. 22  is a view showing the error window displayed when the desired due date of delivery input in the detail information input window has an error in the purchase request system according to the embodiment of the present invention. 
     In the error window  03 - 11 - 01  shown in  FIG. 22 , a predetermined error message representing that the desired due date of delivery input by the requester in the detail information input window  03 - 05 - 00  is the date of a holiday in the calendar is displayed. In addition, the “OK” button and “ignore” button are displayed. 
     When the “OK” button is clicked, the detail information input window  03 - 05 - 00  is displayed again to newly set the desired due date of delivery. When the “ ignore” button is clicked, predetermined data representing that the requester desires delivery of the article at the desired due date of delivery, though he/she agrees that the desired due date of delivery currently set is the date of a holiday, is transmitted to the A/S  2 . Upon receiving the predetermined data, the A/S  2  writes the data of detail information in the D/B  5 . 
     When the “approval request” button is clicked in association with the article whose detail information is written in the D/B  5  (i.e., the article registered in the detail information input window  03 - 05 - 00 ), an approval request window  05 - 01 - 00  for a many-item request shown in  FIG. 19 , which can be displayed by the approval request processing module ( 05 ), is displayed. 
     The function of confirming the desired due date of delivery is also executed for the detail information input window  03 - 06 - 00  for a one-item request. 
       FIG. 19  is a view showing a state wherein the approval request window for a many-item request is displayed together with the detail information input window by the approval request processing function of the purchase request system according to the embodiment of the present invention. 
     In the approval request window  05 - 01 - 00  for a many-item request shown in  FIG. 19 , approvers in charge for the section to which the requester who is requesting approval belongs are displayed by a pull-down menu (when proxy approvers are set in the login window  01 - 02 - 02 , the proxy approvers are displayed). The requester selects one of the approvers from the menu and clicks the “OK” button. With this operation, the purchase request operation and approval request operation for a plurality of articles by the requester are ended. At this time point, mail ( FIG. 7 ) for notifying the approver of the approval request is transmitted to the approver selected in the menu by the mailer function of the M/S  4 . 
       FIG. 20  is a view showing a state wherein the approval request window for a one-item request is displayed together with the detail information input window by the approval request processing function of the purchase request system according to the embodiment of the present invention. 
     Referring to  FIG. 20 , the detail information input window  03 - 06 - 00  for a one-item request and the approval request window  05 - 02 - 00  for a one-item request are displayed together. Catalog data of an article selected in the requested article selection list window  03 - 03 - 00  is displayed as “article information” at the left portion of the detail information input window. As in the approval request window  05 - 01 - 00  shown in  FIG. 19 , the requester requests the approver for approval in the approval request window  05 - 02 - 00 . For a one-item request as well, mail for notifying the approver of the approval request is transmitted to the approver selected in the menu at this time point. 
     Acceptance Result Display Processing Module ( 06 ) 
       FIG. 23  is a view showing the acceptance result list window displayed by the acceptance result display function in the purchase request system according to the embodiment of the present invention. 
     In an acceptance result list window  06 - 01 - 00  shown in  FIG. 23 , an operation method designation dialogue box is displayed, like the dialogue box for designating search conditions and display form in the request state display window  02 - 01 - 01  shown in FIG.  12 . When predetermined items are input to this designation dialogue box, and the “search” button is clicked, accepted articles read out from the D/B  5  are displayed as a list. 
     The functions that can be executed by the user of the client  1  as the requester from the display  22  have been described above. 
     Next, various functions that can be executed by the user of the client  1  as an approver will be described. The approver can use the above-described functions as a requester and also use the approval processing function realized by the approval processing module ( 07 ), which can be executed by only the approver, and the temporary worker management function realized by the temporary worker management module ( 08 ). In the following description, a detailed description of functions that can be used by the approver as a requester will be omitted, and the approval processing function ( 07 ) and temporary worker management function ( 08 ) will be described. 
     In accessing the purchase request system, the approver can log in to the system from the above-described predetermined HP. When approval request mail is received, the approver can also access the system from a mailer window shown in FIG.  7 . The procedure of access will be described. 
       FIG. 7  is a view showing a mailer window displayed when approval request mail is sent to the approver by the mailer function of the purchase request system according to the embodiment of the present invention. 
     Approval request mail from the requester is transmitted by the M/S  4  to the approver designated by the requester, and a window  31  shown in  FIG. 7  is displayed on the client  1  of the approver. When the approver clicks an approval request number column  32 , the mail addresses of the requester and approver, a comment representing that an approval request is received, and the URL of the purchase request system are displayed at the lower portion of the window  31 . When the approver clicks the URL portion of a display area  33 , the above-described login window  01 - 01 - 00  shown in  FIG. 9  is displayed. The approver can log in to the purchase request system from this window. 
     The reason why the system is set such that the login window can be opened from the mailer window is as follows. The login window has a relatively small number of displayed items and a large blank portion. When the system manager describes information items using the blank portion, the approver can easily recognize the message of the information items on the layout. 
     However, the window to be opened is not limited to this. For example, when priority is given to the convenience for the approver, the mail address of the approver, which is set as the destination of the mail, is acquired from the M/S  4  to the A/S  2 . The user ID of the approver is read out from the D/B  5  to the A/S  2  on the basis of the mail address. Processing from login to opening of an approval request list window  07 - 01 - 00  can be automatically performed by the A/S  2  using the readout user ID. In this case, since the approver need not perform the login operation by himself/herself, the convenience for the approver can be improved. 
     Approval Processing Module ( 07 ) 
     When login of the approver from the login window  01 - 01 - 00  is ended, the approval request list window  07 - 01 - 00  shown in  FIG. 24  is displayed on the display  22  of the client  1  of the approver by the function of the approval processing module ( 07 ), as described above with reference to  FIGS. 31 and 32 . 
       FIG. 24  is a view showing the approval request list window displayed by the approval processing function in the purchase request system according to the embodiment of the present invention. 
     Not only buttons representing functions that can be used by a requester but also the “approval processing” button and “temporary worker management, button are provided at the upper portion of the approval request list window  07 - 01 - 00  shown in FIG.  24 . 
     In the approval request list window, various data of an article for which approval request mail is received are displayed as a list, as shown in FIG.  24 . Even when one approval request number is clicked in the window  31  shown in  FIG. 7 , all articles read out from the D/B  5  by the A/S  2  on the basis of the user ID of the approver are displayed as a list on the approval request window. 
     When a request number in the list displayed in the window is clicked, a details confirmation window (not shown) in which detail information of the article with the request number is displayed. The window has the approval select” button and “rejection select” button. The functions of these buttons will be described below. 
       FIG. 25  is a view showing the approval processing window of the approval processing function in the purchase request system according to the embodiment of the present invention. 
     A approval processing window  07 - 02 - 01  shown in  FIG. 25  is displayed at the lower portion of the approval request list window or as another window when one or more articles are selected in the approval request list window  07 - 01 - 00 , and the “approval select” button is clicked. When an amount more than 200,000 is set for an article to be approved, a predetermined message representing this amount is displayed, as shown in FIG.  25 . This aims at calling the approver&#39;s attention to confirm whether the purchase quantity of the article has no input error. When the “OK” button is clicked in this approval processing window  07 - 02 - 01 , purchase of the article displayed in this window is approved. Predetermined data representing approval is transmitted to the A/S  2 , and the status of the article in the D/B  5  is updated from “wait for approval” to “approved”. 
     When the status of the article in the D/B  5  is updated to “approved”, the column of the approved article is deleted from the displayed items of the list of the approval request list window  07 - 01 - 00  (In the display example in  FIG. 24 , one article is displayed as an approval-requested article. In this case, only predetermined items of the list are displayed by “approving” the article). 
       FIG. 26  is a view showing the rejection processing window of the approval processing function in the purchase request system according to the embodiment of the present invention. 
     A rejection processing window  07 - 02 - 02  shown in  FIG. 26  is displayed at the lower portion of the approval request list window or as another window when one or more articles are selected in the approval request list window  07 - 01 - 00 , and the “rejection select” button is clicked. When the “OK” button is clicked in this rejection processing window  07 - 02 - 02 , purchase of the article displayed in this window is rejected. Predetermined data representing rejection is transmitted to the A/S  2 , and the status of the article in the D/B  5  is updated from “wait for approval” to “rejected”. 
     When the approver performs the approval or rejection operation as described above, data in the D/B  5  is updated. In addition, mail for notifying the requester that the purchase of the approval-requested article is approved or rejected is transmitted to the requester by the automatic mail function of the M/S  4 . 
       FIG. 8  is a view showing a mailer window displayed when mail replying to the approval request is sent to the requester by the mailer function of the purchase request system according to the embodiment of the present invention. 
     Mail from the approver is automatically transmitted by the M/S  4  to the mail address which is registered in advance by the requester of the article for which approval or rejection is determined. Thereby, a window  31  shown in  FIG. 8  is displayed on the client  1  of the requester. When the requester clicks an approval request number column  34 , the mail addresses of the requester and approver, a comment representing that the reply to the approval request is received, and the URL of the purchase request system are displayed at the lower portion of the window  31 . When the requester clicks the URL portion of a display area  35 , the above-described login window  01 - 01 - 00  shown in  FIG. 9  is displayed. The requester can log in to the purchase request system from this window and confirm the latest state of the LL requested article in the request state display window  02 - 01 - 01 . 
     In this case as well, as in the mail window shown in  FIG. 7 , when the mail address of the requester, which is set as the destination of the mail, is acquired from the M/S  4  to the A/S  2 . The user ID of the requester is read out from the D/B  5  to the A/S  2  by looking up the D/B  5  on the basis of the mail address. When processing from login to opening of the request state display window  02 - 01 - 01  is automatically performed by the A/S  2  using the readout user ID, the requester need not perform the login operation by himself/herself, the convenience for the requester can be improved. 
     Temporary Worker Management Processing Module ( 08 ) 
     When the “temporary worker management” button is clicked by the approver, a temporary worker list window  08 - 01 - 00  shown in  FIG. 27  is displayed by the function of the temporary worker management processing module ( 08 ). 
       FIG. 27  is a view showing the temporary worker list window of the temporary worker management function in the purchase request system according to the embodiment of the present invention. 
     In the temporary worker list window  08 - 01 - 00  shown in  FIG. 27 , a temporary worker (the user of the client  1  who is not registered in the personnel data  7 ) can be registered, corrected, or deleted as a requester of this system. At this time, on the basis of the user ID (employee code) of the login user as an approver, data of temporary workers registered by the section code of the section managed by the user are read out from the D/B  5 , and the temporary workers are displayed on the client  1  of the approver as a list in the window. 
     To register a temporary worker, the “register” button of the temporary worker list window  08 - 01 - 00  is clicked. A temporary worker registration window  08 - 02 - 01  shown in  FIG. 28  is displayed at the lower portion of the temporary worker list window or as another window. 
       FIG. 28  is a view showing the temporary worker registration window of the temporary worker management function in the purchase request system according to the embodiment of the present invention. 
     In the temporary worker registration window  08 - 02 - 01  shown in  FIG. 28 , predetermined items such as the name, date of birth, staffing agency, and business office of a temporary worker to be registered are input, and then, the “OK” button is clicked. The input data are transmitted to the A/S  2  and written in the D/B  5 . 
     To delete a temporary worker, the target temporary worker is selected from the list in the temporary worker list window  08 - 01 - 00 , and the “delete” button is clicked. With this operation, a temporary worker deletion window  08 - 02 - 03  shown in  FIG. 29  is displayed at the lower portion A of the temporary worker list window or as another window. 
       FIG. 29  is a view showing the temporary worker deletion window of the temporary worker management function in the purchase request system according to the embodiment of the present invention. 
     In the temporary worker deletion window  08 - 02 - 03  shown in  FIG. 29 , the registered information of the selected temporary worker is displayed. When the “OK” button in this window is clicked, predetermined data representing deletion is transmitted to the A/S  2 . The registered data of the temporary worker is deleted from the D/B  5 . 
     To correct the registered data of a temporary worker, the “correct” button is clicked in accordance with the same procedure as that for deletion. A temporary worker correction window  08 - 02 - 02  (not shown) substantially the same as for deletion in  FIG. 29  is displayed. Data is corrected in this window, and the “OK” button is clicked. 
     According to the temporary worker management function realized by the above-described temporary worker management processing module ( 08 ), temporary workers which are not registered in the personnel data  7  can be appropriately managed. 
     [Other Embodiments] 
     The object of the present invention can be achieved even by supplying a storage medium storing software program codes for realizing the function of the above-described embodiment to a client and server, and causing the computer (or a CPU or an MPU) of the client or server to read out and execute the program codes stored in the storage medium. 
     In this case, the program codes read out from the storage medium realize the function of the above-described embodiment by themselves, and the storage medium storing the program codes constitutes the present invention. 
     As a storage medium for supplying the program codes, a floppy disk, a hard disk, an optical disk, a magnetooptical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used. 
     The function of the above-described embodiment is realized not only when the readout program codes are executed by the computer but also when the OS (Operating System) running on the computer performs part or all of actual processing on the basis of the instructions of the program codes. 
     The function of the above-described embodiment is also realized when the program codes read out from the storage medium are written in the memory of a function expansion board inserted into the computer or a function expansion unit connected to the computer, and the CPU of the function expansion board or function expansion unit performs part or all of actual processing on the basis of the instructions of the program codes. 
     As has been described above, according to the above embodiment, the conventional business procedures including preparation, issue, and transfer of physical purchase slips are abolished, and the following matters are realized. 
     According to the client  1  (client  1  used by the user as a requester) as the purchase request apparatus in the above-described purchase request system, purchase of various articles can be efficiently requested. 
     According to the client  1  (client  1  used by the user as a requester) as the purchase request apparatus in the above-described purchase request system, purchase requests of various articles and change in requested contents become flexible. 
     According to the client  1  (client  1  used by the user as a requester) as the purchase request apparatus in the above-described purchase request system, data associated with a desired article to be purchase-requested can be accurately input. 
     According to the above-described purchase request system, various articles can be efficiently purchased using the existing terminal group. 
     According to the above-described purchase request system, various articles can be efficiently purchased. In addition, according to the above-described purchase request system, temporary workers which are not registered in the personnel database can be appropriately managed. 
     According to the client  1  (client  1  used by the user as an approver) as the purchase request approving apparatus in the above-described purchase request system, approval or rejection of a purchase-requested article can be efficiently input. 
     As many apparently widely different embodiments of the present invention can be made without departing from the spirit and scope thereof, it is to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims.