Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">
</script>
<script>
$(document).ready(function(){
 var lastms,d;
$("button").click(function(event){
  if (lastms){
    d=event.timeStamp - lastms
    $("p").text("Milliseconds since last click event: " + d);
  } else {
    $("p").text("Click the button again.");
  }
  lastms=event.timeStamp;
});  
});  
</script>
</head>
<body>

<button>Click me</button>
<p></p>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.