diff --git a/js/g2tt.js b/js/g2tt.js
index 3c58fe4..626d9bf 100644
--- a/js/g2tt.js
+++ b/js/g2tt.js
@@ -55,12 +55,20 @@ $(document).ready(function () {
 
         request.done(function (response, textStatus, jqXHR) {
             console.log(response['content']);
-            $.cookie('g2tt_sid', response['content'].session_id, {
-                expires: 7
-            });
-            $('.login').addClass('hidden');
-            $('#main').removeClass('hidden');
-            load();
+            if (response['content'].error =='LOGIN_ERROR'){
+                window.alert("Username and/or Password were incorrect!");       
+            }
+            if (response['content'].error =='API_DISABLED'){
+                window.alert("The API Setting is disabled. Login on the desktop version and enable API in the Preferences.");       
+            }
+            else {
+                $.cookie('g2tt_sid', response['content'].session_id, {
+                    expires: 7
+                });
+                $('.login').addClass('hidden');
+                $('#main').removeClass('hidden');
+                load();
+            }
         });
 
         // callback handler that will be called on failure