title: jQuery Validation plugin - how to change css on error
body: <p>I am following the demo over here</p>
  
  <p><a href="http://jquery.bassistance.de/validate/demo/marketo/" rel="noreferrer">http://jquery.bassistance.de/validate/demo/marketo/</a></p>
  
  <p>On submitting the form, if the field is empty, how are the input boxes and other fields getting that red border around them? What is it I have to add in my plugin decleration to get that?</p>
  
  <p><strong>Update</strong></p>
  
  <pre><code>$("#profile_form").validate({
          rules: {
              nickname: "required",
              address: "required"
          },
          messages: {
              nickname: "(required)",
              address: "&amp;nbsp;(required)"
          }
      });
  </code></pre>
  
  <p>I know how to get the border via css, I need to know how is the validate plugin changing the css.</p>
  
  <p>Regards</p>