[jQuery] this inside of click event

[bob]

Hi,
What does this inside of
$('.test').click(function() {
refer to?

<script type="text/javascript">
  $(document).ready(function() {
                $('.test').click(function() {
                        alert('this = ' + this);
                });

  });
</script>

<a href="#" class="test">Click Me</a>