How to ignore click event when clicked on children

So I have the following scenario:

<div id="block">
Sample text.
<a href="#">Anchor link</a>
</div>

<script type="text/javascript">
    $("#block").click(function() { alert('test'); });
</script>

When I click anywhere inside the div, I'm getting the 'test' alert. But, I want to prevent that from happening when I click on the "Anchor link". How can I implement that?

Thanks