代码示例:(标识:eg_js_date_getSeconds)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript getSeconds()</h2>

<p>getSeconds() 方法以数字(0-59)返回日期的秒:</p>

<p id="demo"></p>

<script>
var d = new Date();
document.getElementById("demo").innerHTML = d.getSeconds();
</script>

</body>
</html>
运行结果: