The getSeconds() method of date object returns seconds of the specified date. Use it for example to get seconds of the specified date.
Syntax
dateObj.getSeconds()
<html>
<head>
<script type="text/javascript">
//Creating date object
var my_date0=new Date();
var my_date1=new Date("August 15, 1947 13:14:00");
var my_date2=new Date("August 15, 1947");
var my_date3=new Date(88,09,12,13,14,00);
var my_date4=new Date("12/12/2014");
document.write(my_date0.getSeconds() + "</br>");
document.write(my_date1.getSeconds() + "</br>");
document.write(my_date2.getSeconds() + "</br>");
document.write(my_date3.getSeconds() + "</br>");
document.write(my_date4.getSeconds() + "</br>");
</script>
</head>
<body>
</body>
</html>
This will produce following result
10
0
0
0
0