dunno show error msg

static/contact-form/form.js

@@ -55,15 +55,16 @@ $(function()
             $btn.text('Sending ...');
         });
 
-
-                    $.ajax({
+        $('#error_message').hide();
+        
+        $.ajax({
                 type: "POST",
                 url: '/contact-form/handler.php',
                 data: $form.serialize(),
                 success: after_form_submitted,
                 error: submit_error(null),
                 dataType: 'json'
-            });
+        });
 
       });
 });