Hi Suresh -
There are *lots* of potentially appropriate forums -- it all depends on what techniques best help you achieve your goal.
The most popular approach to this is probably using cookies -- small text files written and stored on the client that tell a server if a person has visited before and possibly what they've done so far, etc. The
Servlets forum would be the best place to look fpr help.
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Michael Ernest, co-author of:
The Complete Java 2 Certification Study Guide