[jQuery] [validate] How can I force element validation if the value is unchanged?

[jQuery] [validate] How can I force element validation if the value is unchanged?


I need to use an ASMX service to validate a phone number. The Web
method requires the phone number and the countryId.
I have the validation working fine except for the case where the user
enters a valid number for, say, the default country (United States)
and then selects some other country, not changing the phone number.
I can force validation when the country dropdown value changes by
using the validator.element() method. But because (previous.old !==
value) returns true (see line 897 in jquery.validate.js), the ajax
call isn't made. What's the best way to force this call so that I can
validate remotely when the country changes?