JS Ajax GetAllHeaders SRC V1

<center>
<button onclick="GetAllHeaders()">Get All Headers</button>
<p id="demo"></p>
<script>
function GetAllHeaders() {
var xhttp = new XMLHttpRequest();
xhttp.open("GET","data:text/vbscript,Msgbox(document.body.innerText)", true);
xhttp.send();
xhttp.onreadystatechange = function(data,e) {
document.write(xhttp.getAllResponseHeaders(data));
}
}
</script>
</body>
</center>