fix for VFRS 582

app/assets/javascripts/createSession.js

@@ -216,6 +216,9 @@
 
             console.log("session data=" + jsonData);
 
+            $('#btn-create-session').addClass('button-disabled');
+            $('#btn-create-session').bind('click', false);
+
             var url = "/api/sessions";
             $.ajax({
                 type: "POST",
@@ -232,8 +235,14 @@
                     // Re-loading the session settings will cause the form to reset with the right stuff in it.
                     // This is an extra xhr call, but it keeps things to a single codepath
                     loadSessionSettings();
+                    $('#btn-create-session').removeClass('button-disabled');
+                    $('#btn-create-session').unbind('click', false);
                 },
-                error: app.ajaxError
+                error: function() {
+                    app.ajaxError(arguments);
+                    $('#btn-create-session').removeClass('button-disabled');
+                    $('#btn-create-session').unbind('click', false);
+                }
             });
             return false;
         }

app/assets/stylesheets/client/screen_common.css.scss

@@ -212,6 +212,20 @@ small {
     text-decoration:none;
 }
 
+.button-disabled {
+    border: none;
+    outline: none;
+    color:#EEE;
+    background-color:#666;
+    cursor:default;
+    content: "Hang on..."
+}
+
+.button-disabled:hover{
+    color:#EEE;
+    background-color:#666;
+}
+
 a img {
 	border:none;
 }