diff --git a/tpftest/ajax2.html b/tpftest/ajax2.html
index e913033..eb561b6 100644
--- a/tpftest/ajax2.html
+++ b/tpftest/ajax2.html
@@ -3,10 +3,11 @@
 <head>
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
 <script>
+var fmt = "text/turtle"
 $(document).ready(function(){
     $("#go").click(function(){
         $.ajax({
-        headers: {Accept : " + format.value + "; charset=utf-8"},
+        headers: {Accept : " + fmt + "; charset=utf-8"},
         url: "http://openvivo.org/tpf/core",
         data: {subject: "http://openvivo.org/a/orcid0000-0002-1304-8447", predicate: "", object: "", page: "1"},
         success: function(data, status){
@@ -18,8 +19,8 @@
 </script>
 </head>
 <body>
-<input type="radio" name="format" value="text/turtle" checked> Turtle<br>
-<input type="radio" name="format" value="application/n-triples"> N-Triples<br>
+<input type="radio" name="format" value="text/turtle" checked onclick="fmt='text/turtle'"> Turtle<br>
+<input type="radio" name="format" value="application/n-triples" onclick="fmt='application/n-triples'"> N-Triples<br>
 <button id="go">TPF request via Ajax of OpenVIVO</button>
 <pre id="output"></pre>
 
