<!DOCTYPE html>
<html>
<body>
<h2>JavaScript getHours()</h2>
<p>getHours() 方法以数字（0-23）返回日期的小时：</p>
<p id="demo"></p>
<script>
var d = new Date();
document.getElementById("demo").innerHTML = d.getHours();
</script>
</body>
</html>