WordPress， 留言板 。。 发表评论按钮点后， 先实行了ajax， 然后才执行" 验证码认证"， 执行顺序 反了，怎么修改。。

wordpress:

guestcomments.php
<div class="form-submit">
                    <input class="btn-comment" name="submit" type="submit" id="submit" tabindex="5" title="提交留言" value="提交留言">
<?php comment_id_fields(); ?>
<?php do_action('comment_form', $post->ID); ?>
</div>

functions.php

function add_security_question_fields() {
    //获取两个随机数, 范围0~9
    $num1=rand(0,9);
    $num2=rand(0,9);
    //最终网页中的具体内容
    echo "<p><label for='math' class='small'>验证码：$num1 + $num2 = ? </label><input type='text' name='sum' class='input' value='' size='25'>"
    ."<input type='hidden' name='num1' value='$num1'>"
    ."<input type='hidden' name='num2' value='$num2'></p>";
}
add_action('comment_form','add_security_question_fields');
add_action( 'comment_post', 'add_security_question_validate', 10, 3 );

function add_security_question_validate( $sanitized_user_login, $user_email, $errors) {
  $sum=$_POST['sum'];//用户提交的计算结果
  switch($sum){
    case $_POST['num1']+$_POST['num2']:
      break;
    case null:
      wp_die('<span style="color: red;">错误：请输入验证码！</span>');
      break;
    default:
      wp_die('<span style="color: red;">错误：验证码错误,请重试！</span>');
  }
}
add_action( 'add_security_question','comment_form' );

ajax-comment.js

jQuery(document).ready(function(jQuery) {
    var $commentform = jQuery('#commentform'),
    $comments = jQuery('#comments-title'),
    $cancel = jQuery('#cancel-comment-reply-link'),
    cancel_text = "取消回复";

https://blog.csdn.net/saberKai/article/details/58603949