<!DOCTYPE html>
<html>
<body>
<p>Click the button to display this window's height and width (including toolbars and scrollbars).</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> The outerWidth and outerHeight properties are not supported in IE8 and earlier.</p>
<p id="demo"></p>
<script>
function myFunction() {
var w = window.outerWidth;
var h = window.outerHeight;
document.getElementById("demo").innerHTML = "Width: " + w + "<br>Height: " + h;
}
</script>
</body>
</html>