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<!DOCTYPE html>
<html>
<body>
​
<p id="demo">Click the button to replace this document with new content.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  document.open("text/html","replace");
  document.write("<h2>Learning about the HTML DOM is fun!</h2>");
  document.close();
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_doc_open by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 31 Mar 2021 13:04:43 GMT -->
</html>
​
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