title: jQuery Datepicker does not update input field upon selecting date
body: <p>I've read all the SO topics on this, and tried numerous things. Even the jQuery Datepicker information page at <a href="http://jqueryui.com/datepicker/#default" rel="nofollow">http://jqueryui.com/datepicker/#default</a> shows the behavior I don't understand.</p>
  
  <p>a. Click in the input field > datepicker pops up
  b. Select a date > visually, input field appears to show your selected date
  c. However, the "value" attribute for the input field does not change to the selected date</p>
  
  <p>What am I missing, please?
  Thanks</p>