how to refresh Yii captcha when validation failed?

Question

how to refresh the Yii captcha word image when validation failed ? here's my code

            jQuery.ajax({
                    type    : "POST",
                    cache   : false,
                    url     : emailfrienddata,
                    data    : 'friendemail='+friendemail+'&sendername='+sendername+'&friendemailcontent='+friendemailcontent+"&captcha="+captcha,
                        success :function(data){
                            if(data == 1){
                             alert('Email Sent');   
                            jQuery.fancybox.close();
                            } else if(data == 2) {
                                alert('wrong captcha!');
//HOW TO REFRESH YII CAPTCHA IN THIS AREA ?
                                return false;
                            }
                        }
                });
            return false;   
            }

Answer 1

You can trigger a click on the refresh button. If you put the captcha in a container with class captcha you could:

$(".captcha a").trigger("click");