表单提交,不想要验证码也可以提交,应该怎么修改,直接删掉验证码会显示错误

{if $is_post_code}

<div class="form-group">

<label class="control-label col-md-2">{dr_lang('验证码')}</label>

<div class="col-md-10">

<label>

<div class="form-recaptcha">

<div class="input-group">

<input type="text" class="form-control" name="code">

<div class="input-group-btn fc-code">

{dr_code(120, 35)}

</div>

</div>

</div>

</label>

</div>

</div>

{/if}

</div>

<div class="portlet-body form myfooter">

<div class="form-actions text-center">

<button type="button" onclick="dr_ajax_submit('{$post_url}', 'myform', '2000', '{$rt_url}')" class="box_bottom_submit btn green"> 提交内容</button>

</div>

</div>