title: Remote Validation OnBlur and Empty String
body: <p>I have a view model with remote validation enabled. In my view I also disabled OnKeyUp</p>
  
  <pre><code>    $(function() {
          $.validator.setDefaults({ onkeyup: false });
      })
  </code></pre>
  
  <p>But if I focus on the text box, and move the focus to another control the remote validation is not fired at all.</p>
  
  <p>Is there a way I can ask remote validation to fire when I configured it to onBlur and empty string?</p>