diff --git a/browser/form.py b/browser/form.py
index 87ab75b..81704a0 100644
--- a/browser/form.py
+++ b/browser/form.py
@@ -34,6 +34,7 @@ from zope.cachedescriptors.property import Lazy
 from zope.formlib.form import Form, EditForm, FormFields
 from zope.publisher.browser import FileUpload
 from zope.publisher.interfaces import BadRequest
+from zope.security.proxy import isinstance
 
 from cybertools.ajax import innerHtml
 from cybertools.browser.form import FormController
diff --git a/browser/loops.js b/browser/loops.js
index 2bb4e9d..22915a4 100644
--- a/browser/loops.js
+++ b/browser/loops.js
@@ -16,7 +16,7 @@ function focusOpener() {
 function replaceFieldsNode(targetId, typeId, url) {
     token = dojo.byId(typeId).value;
     dojo.io.updateNode(targetId, {
-            url: url + '?form.type=' + token,
+            url: url + '?form.type=' + token
     });
 }