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<!DOCTYPE html>
<html>
<body>
​
<p>Click the button to write some text in the new window and the source (parent) window.</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  var myWindow = window.open("", "myWindow", "width=200,height=100");
  myWindow.document.write("<p>This is 'myWindow'</p>");
  myWindow.opener.document.write("<p>This is the source window!</p>");
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_opener by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:45:45 GMT -->
</html>
​
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