Description: This attribute returns the number of milliseconds since January 1, 1970, when the event is triggered.
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<script>var last;
$(document.body).click(function(event) {
if( last )
alert( "time since last event " + event.timeStamp - last );
last = event.timeStamp;
}); </script>
</body>
</html>