* Fix JS issue introduced in 9f840628

** This would cause the "Stripe.js token not passed!" because of a JS error.

js/civicrm_stripe.js

@@ -2,7 +2,7 @@
  * @file
  * JS Integration between CiviCRM & Stripe.
  */
-(function ($) {
+(function($, CRM) {
 
   var $form, $submit, buttonText;
 
@@ -93,4 +93,4 @@
       return false;
     });
   });
-}(CRM.$));
+}(cj, CRM));

stripe.php

@@ -125,7 +125,7 @@ function stripe_civicrm_buildForm($formName, &$form) {
         if (empty($form->_attributes['class'])) {
           $form->_attributes['class'] = '';
         }
-        $form->_attributes['class'] .= " stripe-payment-form";
+        $form->_attributes['class'] .= ' stripe-payment-form';
         $form->addElement('hidden', 'stripe_token', NULL, array('id' => 'stripe-token'));
         stripe_add_stripe_js($form);
       }
@@ -152,7 +152,10 @@ function stripe_civicrm_buildForm($formName, &$form) {
   );
   if (in_array($formName, $backendForms) && !empty($form->_processors)) {
     if (!isset($form->_elementIndex['stripe_token'])) {
-      $form->_attributes['class'] .= " stripe-payment-form";
+      if (empty($form->_attributes['class'])) {
+        $form->_attributes['class'] = '';
+      }
+      $form->_attributes['class'] .= ' stripe-payment-form';
       $form->addElement('hidden', 'stripe_token', NULL, array('id' => 'stripe-token'));
       stripe_add_stripe_js($form);
     }