Ping every milesecond

status.html

<script src="http://liamka.me/assets/js/jquery.min.js"></script>
<script type="text/javascript">
	setInterval(function () {
		$.ajax({url:'http://signaldnb.com/',
			success: function(data){
				$('#status').append("<div>Ok - " + new Date($.now()) + "</div>");
			},
			error: function(error){
				$('#status').append("<div style='color: red;'>none - " + new Date($.now()) + "</div>");
			}
		});
	}, 1/100);
</script>
<div id="status"></div>