<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("button").click(function(event){
$("span").text(event.timeStamp);
});
});
</script>
</head>
<body>
<p>The click event occurred <span style="color:red">unknown</span> milliseconds after January 1, 1970.</p>
<button>Click me</button>
</body>
</html>