title: jQuery validation plugin: accept only US, Canada and Mexic zip code?
body: <p>I'd like to use jQuery validation plugin to validate a zip code field that accept only US, Canadian or Mexican zip code format, but there doesn't seem to be a defined rule for it. I've searched Google but I've found nothing useful.</p>
  
  <p>I have to accept only these zip code formats:</p>
  
  <p>US: 99999-9999 or 99999
  Canada: A9A 9A9
  MX: 99999</p>
  
  <p>Appreciate your help.</p>