Watch
HTML
<h2>Watch</h2>
<p id="demo"></p>
<button onclick="myFunction()">Start</button>
<button onclick="myStopFunction()">Stop</button>
JavaScript
var myVar;
function myFunction() {
myVar = setInterval(time, 1000);
}
function time() {
d = new Date;
x = d.toString().split(' ');
y = x[4];
document.getElementById('demo').innerHTML = y;
}
function myStopFunction() {
clearInterval(myVar);
}