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<!DOCTYPE html>
<html>
<head>
<script>
function myFunction() {
  var myWindow = window.open("", "myWin", "left=700, top=350, width=200, height=100");
​
  var winLeft = myWindow.screenLeft ? myWindow.screenLeft : myWindow.screenX;
  var winTop = myWindow.screenTop ? myWindow.screenTop : myWindow.screenY;
​
  myWindow.document.write("<p>This is 'myWin'");
  myWindow.document.write("<br>Horizontal: " + winLeft);
  myWindow.document.write("<br>Vertical: " + winTop + "</p>");
}
</script>
</head>
<body>
​
<p>Click the button to create a new window and get the horizontal and vertical coordinates of the new window relative to the screen.</p>
​
<button onclick="myFunction()">Open "myWin"</button>
​
<p id="demo"></p>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_screenx3 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:10 GMT -->
</html>
​
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