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how to restrict fields to numbers/ letters only?

how to restrict fields to numbers/ letters only? without enabling the user to passed the page until he/she writes the correct input?
Oct 4 '10 #1
1 3493
RamananKalirajan
608 512MB
You have to write JS code for that. Here goes a sample.

Thanks and Regards
Ramanan Kalirajan
Oct 4 '10 #2

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