jquery masked input plugin to not clear field when errored

Question

I\'m looking at the http://digitalbush.com/projects/masked-input-plugin/

I\'m calling it like this:

$(control).mask(\'999-999-9999\');

Answer 1

It looks like I should just make the whole mask optional:

mask('?999-999-9999')

That way the control thinks what the user has is "valid" and I can continue. Even though it isn't really the optional part of the mask.