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<html><body><p id="demo">Clock</p><button onclick="clearInterval(myTimer)">Stop</button><script>var myTimer = setInterval(myClock, 1000);function myClock() { document.getElementById("demo").innerHTML = new Date().toLocaleTimeString();}</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_setinterval by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 17:07:17 GMT --></html>