验证码一直显示不正确

代码修改了也没有变化

<div class="register-box">
 <div class="container">
  <div class="register">
   <div class="register-title">
    <ul class="cl">
     {loop $register.group $i}
     <li class="{if $groupid == $i}active{/if}">
      <a href="{dr_member_url('register/index', ['groupid' => $i])}" >{$group[$i][name]}</a>
     </li>
     {/loop}
    </ul>
   </div>
   <form action="" class="reg-form" method="post" name="myform" id="myform">
    {$form}
    {if in_array('username', $register.field)}
    <div class="reg-item cl" id="dr_row_username">
     <span class="reg-name fl">用户名称</span>
     <input type="text" class="reg-input fl" name="data[username]" id="dr_username">
    </div>
    {/if}
    {if in_array('email', $register.field)}
    <div class="reg-item cl" id="dr_row_email">
     <span class="reg-name fl">用户邮箱</span>
     <input type="text" class="reg-input fl" name="data[email]" id="dr_email">
    </div>
    {/if}
    {if in_array('phone', $register.field)}
    <div class="reg-item cl" id="dr_row_phone">
     <span class="reg-name fl">手机号码</span>
     <input type="text" class="reg-input fl" name="data[phone]" id="dr_phone">
    </div>
    {/if}
    <div class="reg-item cl" id="dr_row_password">
     <span class="reg-name fl">用户密码</span>
     <input type="password" class="reg-input fl" name="data[password]" id="dr_password">
    </div>
    <div class="reg-item cl" id="dr_row_password2">
     <span class="reg-name fl">确认密码</span>
     <input type="password" class="reg-input fl" name="data[password2]" id="dr_password2">
    </div>
         {$myfield}
                  {if $register.sms}
    <div class="reg-item cl" id="dr_row_sms">
     <span class="reg-name fl">短信验证</span>
     <input class="reg-sms-input fl" type="text" autocomplete="off" id="dr_sms" name="sms">
     <button class="btn reg-sms-btn fl" onclick="dr_ajax_url('/index.php?s=member&c=api&m=register_code&id='+$('#dr_phone').val())" type="button">获取手机验证码</button>
    </div>
    {/if}
    {if $register.sms || $register.code}
    <div class="reg-item cl" id="dr_row_code">
     <span class="reg-name fl">安全验证</span>
     <input class="reg-code-input fl" type="text" autocomplete="off" name="code" id="dr_code">
     <div class="reg-code-btn fl">{dr_code(120, 35)}</div>
    </div>
    {/if}
    <div class="reg-item cl">
     <label style="margin-left:20px;">
      <input type="checkbox" name="is_protocol" value="1" checked> 我已阅读并同意
      <span></span>
     </label>
     <label>
      <a href="javascript:dr_show_protocol();">《用户注册协议》</a>
     </label>
    </div>
    <button type="button" class="reg-btn" onclick="dr_ajax_member('{dr_now_url()}', 'myform');">立即注册</button>
   </form>
  </div>
 </div>
</div>