Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<script>
function myFunction() {
    var myWindow = window.open("", "myWin");
    myWindow.document.write("<p>This is 'myWin'");
    myWindow.document.write("<br>ScreenX: " + myWindow.screenX);
    myWindow.document.write("<br>ScreenY: " + myWindow.screenY + "</p>");
}
</script>
</head>
<body>

<button onclick="myFunction()">Open "myWin"</button>

</body>
</html>