Registration Form Default HTML

<div id="wpmem_reg"><a name="register"></a>
  <form name="form" method="post" action="http://example.com/register-page/" id="" class="form">
    <fieldset>
      <legend>New User Registration</legend>
      <label for="user_login" class="text">Choose a Username<span class="req">*</span></label>
      <div class="div_text">
        <input name="user_login" type="text" id="user_login" value="" class="textbox" required="">
      </div>
      <label for="first_name" class="text">First Name<span class="req">*</span></label>
      <div class="div_text">
        <input name="first_name" type="text" id="first_name" value="" class="textbox" required="">
      </div>
      <label for="last_name" class="text">Last Name<span class="req">*</span></label>
      <div class="div_text">
        <input name="last_name" type="text" id="last_name" value="" class="textbox" required="">
      </div>

      <!-- other custom fields removed for brevity -->

      <label for="user_email" class="text">Email<span class="req">*</span></label>
      <div class="div_text">
        <input name="user_email" type="email" id="user_email" value="" class="textbox" required="">
      </div>
      <input name="a" type="hidden" value="register">
      <input name="wpmem_reg_page" type="hidden" value="http://example.com/page-user-is-on/">
      <div class="button_div">
        <input name="submit" type="submit" value="Register" class="buttons">
      </div>
      <div class="req-text"><span class="req">*</span>Required field</div>
    </fieldset>
  </form>
</div>