--- auto_complete_macros_helper.rb	2008-05-09 15:44:29.013646700 +0800
+++ a.rb	2008-05-09 15:44:55.154439000 +0800
@@ -70,6 +70,16 @@
     js_options[:frequency]  = "#{options[:frequency]}" if options[:frequency]
     js_options[:method]     = "'#{options[:method].to_s}'" if options[:method]
 
+    if protect_against_forgery?
+      if js_options['parameters']
+        js_options['parameters'] << " + '&"
+      else
+        js_options['parameters'] = "'"
+      end
+      js_options['parameters'] << "#{request_forgery_protection_token}=' + encodeURIComponent('#{escape_javascript form_authenticity_token}')"
+    end
+
+
     { :after_update_element => :afterUpdateElement, 
       :on_show => :onShow, :on_hide => :onHide, :min_chars => :minChars }.each do |k,v|
       js_options[v] = options[k] if options[k]