Duda sobre serialize y action en Ajax Jquery

[hector2c]

Código HTML:

<script language="javascript" type="text/javascript" src="extras/js/jquery/jquery-1.3.2.min.js"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
    $('#AddFormulario').submit(function(){
		if ($(this).attr("action")==""){
			alert("no hay action");
			return false;
		}else{
			$.ajax({
				url: $(this).attr('action'),
				type:'POST',
				data:$(this).serialize(),
			});
			return true;
		}
    });
});
</script>
<form method="post" id="AddFormulario" action="">
	<input type="submit" value="XD" />
</form>