in reply to Input Filtering Requirements
Have you considered numeric values in the name fields..
Re: form validation has a neat little routine to look after this..
There is also How do I detect and handle empty form fields? which might be of use.
If it is just length you are looking for then Re: Length validation spells it out nicely..
Some other links that might prove useful
- more links - CGI parameter Validation
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Seekers of Perl Wisdom