These are additional guidelines to the programming assignment 1.

1. For the HTML document of the question 1, you can use text boxes, 
   checkboxes, radio buttons, selection menus, or text areas to collect 
   the information. A link to the CGI program that produces a table of
   products must be accessible from one of the HTML doucuments you
   created.

2. The Perl CGI program created for the question 2-(1) question should 
   write the data collected through the form into a file (store.dat) 
   if the data entry has been verified and should reply with a confirmation.  
   Otherwise, it should display some appropriate error message.

3. Error checking should be applied to both blank and inappropriate 
   entries such as entering a string where a number is expected.

4. For the question 2-(2), the program should display a list of 
   products in your store. There must be at least 10 products.

5. The login screen is typically a HTML document with a login text
   box and a password text box. Once the login and password have
   been submitted, the user name and password are checked against 
   a list of user name and password pairs in a password file.
   If the user name matches the password, then a list of products is 
   displayed. Otherwise, a login error message is displayed.

6. The CGI programs for the password verifying and the product listing
   can be integrated into one program. 

7. To show the main page and other pages for this assignment, these pages 
   should be put under your public_html directory. The operations should 
   be described in your document.