diff --git misc/ajax.js misc/ajax.js
index d0025e6..99b6a38 100644
--- misc/ajax.js
+++ misc/ajax.js
@@ -86,6 +86,7 @@ Drupal.behaviors.AJAX = {
  * @endcode
  */
 Drupal.ajax = function (base, element, element_settings) {
+
   var defaults = {
     url: 'system/ajax',
     event: 'mousedown',
@@ -104,6 +105,8 @@ Drupal.ajax = function (base, element, element_settings) {
   $.extend(this, defaults, element_settings);
 
   this.element = element;
+  // Turn off the normal form submit, since we will use this only with AJAX.
+  $(element).submit(function() { return false; });
 
   // Replacing 'nojs' with 'ajax' in the URL allows for an easy method to let
   // the server detect when it needs to degrade gracefully.
@@ -188,6 +191,9 @@ Drupal.ajax = function (base, element, element_settings) {
  * before field data is collected.
  */
 Drupal.ajax.prototype.beforeSerialize = function (element, options) {
+  // Disable the element that received the change.
+  $(this.element).addClass('progress-disabled').attr('disabled', true);
+
   // Allow detaching behaviors to update field values before collecting them.
   var settings = this.settings || Drupal.settings;
   Drupal.detachBehaviors(this.form, settings, 'serialize');
@@ -197,8 +203,6 @@ Drupal.ajax.prototype.beforeSerialize = function (element, options) {
  * Handler for the form redirection submission.
  */
 Drupal.ajax.prototype.beforeSubmit = function (form_values, element, options) {
-  // Disable the element that received the change.
-  $(this.element).addClass('progress-disabled').attr('disabled', true);
 
   // Server-side code needs to know what element triggered the call, so it can
   // find the #ajax binding.