How to fix the "Leave a comment" button?

Question

css

Guys, the "leave a comment" button on the site does not work. Here is the code:

<div id="tab-review" class="tab-content">
      <input type="text" name="name" value="" placeholder="Введите ваше имя..." />
      <div class="enter-or-reg">или <a href="/index.php?route=account/register">Зарегистрируйтесь</a></div>

      <textarea name="text" cols="40" rows="8" style="width: 98%; padding: 3px; font-size: 15px; background-color: #fff; resize: none;" placeholder="Введите Ваш комментарий..."></textarea>
      <span style="font-size: 11px;"><?php echo $text_note; ?></span>
      <b><?php echo $entry_captcha; ?></b>
      <input type="text" name="captcha" value="" style="width: 100px; height: 27px; border: 1px solid #008000; margin-left: 10px;" />
      <img src="index.php?route=product/product/captcha" alt="" id="captcha" class="captcha-align" />
      <div class="buttons">
        <div class="left"><a id="button-review" class="enter-comment"><?php echo $button_continue; ?></a></div>
      </div>
    </div>

What could be the problem? Site on opencart. Unfortunately on local server :(