Another JavaScript question, validation

["Paul Holm" <pholm@xxxxxxxxxxxxxxxxx>]

Ron,

The standard way to do validation is 2 phase.

Use JavaScript on the client to catch issues such as required fields, field
length, etc BEFORE the form is submitted.

Then since JavaScript can be turned off and some constraints and rules may
be enforced at the database level you must also validate on the server.  If
you have an error you can return to the calling JSP and show the user the
error.  The error can be put in the session or request.

So steps are:

1. Forms have javaScript to validate  on the client
2. Forms submitted to server where server side validation and database
validation occur
3. Try catch around database code return errors back to jsp for user display

Here is an example of both client side (notice required fields and server
side,  try to insert a customer with the same customer #  as an existing)

http://www.planetjavainc.com/wow63x/runApp?id=371&_pj_lib=wowsamp60


Duplicate key assume you have a unique index on cusnum.

HTH



Thanks,  Paul

Business: 760-432-0600   Cell:  760-415-8830
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