Dynamic form modification cookbook: Fix inclusion of code

Includes in a code block don't work, replace them with the actual code

cookbook/form/dynamic_form_modification.rst

@@ -653,7 +653,31 @@ field according to the current selection in the ``sport`` field:
             {# ... #}
         {{ form_end(form) }}
 
-        .. include:: /cookbook/form/dynamic_form_modification_ajax_js.rst.inc
+        <script>
+        var $sport = $('#meetup_sport');
+        // When sport gets selected ...
+        $sport.change(function(){
+          // ... retrieve the corresponding form.
+          var $form = $(this).closest('form');
+          // Simulate form data, but only include the selected sport value.
+          var data = {};
+          data[$sport.attr('name')] = $sport.val();
+          // Submit data via AJAX to the form's action path.
+          $.ajax({
+            url : $form.attr('action'),
+            type: $form.attr('method'),
+            data : data,
+            success: function(html) {
+              // Replace current position field ...
+              $('#meetup_position').replaceWith(
+                // ... with the returned one from the AJAX response.
+                $(html).find('#meetup_position')
+              );
+              // Position field now displays the appropriate positions.
+            }
+          });
+        });
+        </script>
 
     .. code-block:: html+php
 
@@ -664,7 +688,31 @@ field according to the current selection in the ``sport`` field:
             <!-- ... -->
         <?php echo $view['form']->end($form) ?>
 
-        .. include:: /cookbook/form/dynamic_form_modification_ajax_js.rst.inc
+        <script>
+        var $sport = $('#meetup_sport');
+        // When sport gets selected ...
+        $sport.change(function(){
+          // ... retrieve the corresponding form.
+          var $form = $(this).closest('form');
+          // Simulate form data, but only include the selected sport value.
+          var data = {};
+          data[$sport.attr('name')] = $sport.val();
+          // Submit data via AJAX to the form's action path.
+          $.ajax({
+            url : $form.attr('action'),
+            type: $form.attr('method'),
+            data : data,
+            success: function(html) {
+              // Replace current position field ...
+              $('#meetup_position').replaceWith(
+                // ... with the returned one from the AJAX response.
+                $(html).find('#meetup_position')
+              );
+              // Position field now displays the appropriate positions.
+            }
+          });
+        });
+        </script>
 
 The major benefit of submitting the whole form to just extract the updated
 ``position`` field is that no additional server-side code is needed; all the