Perl only runs on the server, not on the client.
If you want to solve this problem using only Perl, you will have to (re)show the forms where no selections have been made yet.
If you want to solve this problem using Javascript, you will have to have your Perl print the appropriate Javascript.
In reply to Re: 'submit' a series of form selections
by Corion
in thread 'submit' a series of form selections
by Anonymous Monk
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