Write a JavaScript program for digital clock.
<html>
<head>
<title>Digital Clock</title>
</head>
<body>
<p>Digital Clock </p>
<h3 id="panel"></h3>
<script type="text/javaScript">
var t = setInterval('timer()', 1000)
function timer()
{
var d = new Date()
document.getElementById('panel').innerHTML = d.toLocaleTimeString()
}
</script>
</body>
</html>
