21     private $captcha;  variable in action_plugin_preregister
40          if($this->captcha == 'none' || $this->captcha == 'builtin')  { 
78         if($this->captcha =='captcha') {         
79             $captcha = $this->loadHelper('captcha', true);
80             if(!$captcha->check()) {
86          if($this->captcha == 'builtin') {
165         if($this->captcha == 'builtin') {        
201        $this->captcha = $this->getConf('captcha');     
203            if(preg_match("/captcha/", $this->captcha)) {                           
204                $this->captcha = 'builtin';
208        if($this->captcha == 'none' || $this->captcha == 'builtin')  { 
212           $this->captcha = 'builtin';
215       $this->captcha ='captcha';