if formdata not there..

code/templates/list.html

@@ -7,8 +7,16 @@
             <input id="list_upload_name" type=hidden name=name value="{{ name|safe }}" />
             <input type=hidden name=from_gui value="true" />
             <input id="list_upload_select" type=file name=file onchange="FileSelectHandler(event)"><br>
-            <!--input id="list_upload_button" type=submit value=Upload disabled-->
+            <input id="list_upload_button" type=submit value=Upload>
             <div id="progress"></div>
+            <script language="javascript">
+                try {
+                    var formdata = new FormData();
+                    document.getElementById("list_upload_button").hidden = true;
+                } catch(err) {
+
+                }
+            </script>
         </form>
    </div>
   {% else %}