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<!DOCTYPE html>
<html>
<body>
​
<p>Click the button to display an alert box.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  alert("Hello! I am an alert box!");
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_alert by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:10 GMT -->
</html>
​
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