<!DOCTYPE html>
<html>
<head><title>XMLHttpRequest</title>
</head>
<body>
    <script type="text/javascript">
    
        try
        {
            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();
        
        }catch(e){}

        parent.window.postMessage("no access to window.XMLHttpRequest", "*");
    </script>
</body>
</html>