Changes

Version 1.7

Numeric keys with Shift key always passed check under Opera. Fixed.
Dot key on NumPad always passed check under Firefox. Fixed.

Version 1.6

Wrong release.

Version 1.5

Navigation keys and Backspace button were broken under Opera. Fixed.

Version 1.4

mask-pnum CSS class added.
$.fn.keyfilter.version property introduced.
Code now checked with jslint and minified with YUI compressor.