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How can I test if a string only contains invalid characters

user479119Feb 21 2007 — edited Feb 21 2007
Hi

I need to create a function to test if a string does not contain any valid characters

e.g. '########' or '********' etc.

If the string contains at least one character that is numeric or letters 'A' - 'Z' then I want to return the string. Otherwise I plan to filter it out.

Can anyone please suggest the best way to test for this?

Thanks
GB
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Locked on Mar 21 2007
Added on Feb 21 2007
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