<!DOCTYPE html>
<html>
<body>
<p>This example uses the HTML DOM to assign an "onresize" event to the body element.</p>
<p>Try to resize the browser window.</p>
<p>Window resized <span id="demo">0</span> times.</p>
<script>
document.getElementsByTagName("BODY")[0].onresize = function() {myFunction()};
var x = 0;
function myFunction() {
var txt = x += 1;
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>