如何对我的reCAPTCHAAJAXAPI进行post请求?

当前,无论在验证码文本字段中键入什么,它都不会验证。它总是给我输入新单词。

我想这是因为我需要测试用户是否输入了正确的验证码答案。我需要发一封邮件请求。

如果能得到任何帮助,我将不胜感激。

这是我的密码:

$(document).ready(function(){

    $('#fhjoinForm').submit(function(e) {

        register();
        e.preventDefault();

    });

});


function register()
{
    hideshow('loading',1);
    error(0);

    $.ajax({
        type: "POST",
        url: "submit.php",
        data: $('#fhjoinForm').serialize(),
        dataType: "json",
        success: function(msg){

                if(parseInt(msg.status)==1)
                {
                Recaptcha.create("pub key xxxxxxxxxxx",
               "recaptcha_div",
                {
                theme: "clean",
                callback: function(){
                // what to do on success
                window.location=msg.txt;
         }

            }

     );
   }

            else if(parseInt(msg.status)==0)
            {
                error(1,msg.txt);
            }

            hideshow('loading',0);
        }
    });

}


function hideshow(el,act)
{
    if(act) $('#'+el).css('visibility','visible');
    else $('#'+el).css('visibility','hidden');
}

function error(act,txt)
{
    hideshow('error',act);
    if(txt) $('#error').html(txt);
}

这是我的邮寄申请

<?php
require_once('recaptchalib.php');
$publickey = "pub key hidden"; // you got this from the signup page
$privatekey = "priv key hidden";

$resp = recaptcha_check_answer ($privatekey,
                                $_SERVER["REMOTE_ADDR"],
                                $_POST["recaptcha_challenge_field"],
                                $_POST["recaptcha_response_field"]);

if ($resp->is_valid) {
    ?>success<?
}
else 
{
    die ("The reCAPTCHA wasn't entered correctly. Go back and try it again." .
       "(reCAPTCHA said: " . $resp->error . ")");
}
?>