Hi Justin, I know you were looking at UK postcodes for a while, in respect to validation, I have noticed that there are a few very specific rules over and above just being only a letter or only a number. I am guessing this could be dealt with overriding the 'extraValidation' function.
http://interim.cabinetoffice.gov.uk/govtalk/schemasstandards/e-gif/datastandards/address/postcode.aspx " * The letters Q, V and X are not used in the first position. * The letters I, J and Z are not used in the second position. * The only letters to appear in the third position are A, B, C, D, E, F, G, H, J, K, S, T, U and W. * The only letters to appear in the fourth position are A, B, E, H, M, N, P, R, V, W, X and Y. * The second half of the Postcode is always consistent numeric, alpha, alpha format and the letters C, I, K, M, O and V are never used. These conventions may change in the future if operationally required. *GIR 0AA is a Postcode that was issued historically and does not confirm to current rules on valid Postcode formats, It is however, still in use. " I think there are a few places on the web where you can find regular expressions specifically for this. hth dan
