If you want to accept entries with 11 digits as well as those with 12 digits, and you are expecting some sort of punctuation to be included among the digits, it will be easiest to eliminate the punctuation first, then just check the string length: 
$pw =~ s/\D+//g;
$fieldValid = ( length( $pw ) == 11 or length( $pw ) == 12 );

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In reply to Re: validating numerical field by graff
in thread validating numerical field by Anonymous Monk

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