​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript Date.now()</h1>
​
<p>Date.now() 是ECMAScript 5（2009）中的新功能：</p>
​
<p id="demo1"></p>
<p id="demo2"></p>
​
<script>
document.getElementById("demo1").innerHTML = Date.now();
var d = new Date();
document.getElementById("demo2").innerHTML = d.getTime();
</script>
</body>
</html>
​