<!DOCTYPE html>
<html>
<head><title>XMLHttpRequest</title>
</head>
<body>
    <script type="text/javascript">
        xhrRequest = new XMLHttpRequest();
        
        xhrRequest.onreadystatechange = function () {
            if (xhrRequest.readyState == 4 && xhrRequest.status == 200) {
            //xhr successful
            parent.window.postMessage("access to window.XMLHttpRequest", "*");
            }
        }
        
        xhrRequest.open("GET", "standalone-pass.htm", true);
        xhrRequest.send();
        
    </script>
</body>
</html>