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<!DOCTYPE html>
<html>
<body>
​
<p>A script on this page starts this clock:</p>
<p id="demo"></p>
​
<button onclick="myStopFunction()">Stop time</button>
​
<script>
var myVar = setInterval(myTimer, 1000);
​
function myTimer() {
  var d = new Date();
  var t = d.toLocaleTimeString();
  document.getElementById("demo").innerHTML = t;
}
​
function myStopFunction() {
  clearInterval(myVar);
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_setinterval_clearinterval by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:11 GMT -->
</html>
​
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