Check an element's class to determine the outcome of an event and push the occurrence to Google Analytics. Useful for tracking successful form submits on Ajax or other form types with static urls. Google Event Tracking Guide: https://developers.google.com/analytics/devguides/collection/gajs/eventTrackerGuide

outcome.html

<div class="outcome" class="successful">
    <p>Thanks, your message has been sent!</p>
</div>

<script>
$(document).ready(function() {
    if ($( '#outcome' ).hasClass( "successful" )) {
      _gaq.push(['_trackEvent', 'Category', 'Action', 'opt_label']);
    }
});
</script>