Maintaining Data Across Sessions:

• Use an <INPUT TYPE="hidden" NAME="..." VALUE="..."> field, or

• Pass the data via the PATH_INFO mechanism, or

• Use <FORM METHOD=POST ACTION="..."> and pass the data via QUERY_STRING

• It is a good idea to use METHOD=POST for all interactive forms (cgi.pl will handle it without changing your code)

• Handling in-lined images:
  • Clean up old image files each time the script is called, or
  • Use another script that returns the image and then deletes it, and use that script in the <IMG SRC="URL"> tag

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