<html>
<body>
<p>Click the button to open a new window, and assure that the new window GETS focus (send the new window to the front).</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var myWindow = window.open("", "", "width=200,height=100");
myWindow.document.write("<p>A new window!</p>");
myWindow.focus();
}
</script>
</body>
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_focus by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:10 GMT -->
</html>