title: jQuery Validator Plugin - update custom error messages
body: <p>I'm using the jQuery Validator plugin successfully on a form. This form is a widget, so space constraints are tight. For that reason, I don't want to show the normal error messages after each form field that doesn't validate.</p>
  
  <p>Rather, for each form field, I have a label, and inside the labels of required fields, I have an <code>&lt;em&gt;</code> with the text '(required)' in it. If the user tries to submit without filling out all fields, I add <code>.css('color', '#F00')</code> to the <code>&lt;em&gt;</code>s of the empty fields, to highlight which fields need to be filled out. That works great, so far.</p>
  
  <p>Now what I need to know is, what event do I use to set an <code>&lt;em&gt;</code> back to black if the user enters data into the associated required field?</p>
  
  <p>I change the <code>&lt;em&gt;</code>s to red like this, currently:</p>
  
  <pre><code>errorPlacement: function(error, element) {
      jQuery(element).prev().children('em').css('color', '#F00');
  }
  </code></pre>