title: How to find if jquery datepicker entry fired the input blur event?
body: <p>I'm validating on blur event for a text input with jquery Datepicker.
  Would like to validate only when the user leaves the text input.
  Currently the blur event fires on every value change of the Datepicker.
  How is it possible to know if the event came from the value change of the Datepicker?</p>