<?php get_template_part('receive_individual_payment_form'); ?>
<div class="modall modall_form"  id="calk_modal" style="display: none" >
   <a class='green-button'
   onClick="getElementById('win_popup_receive_individual_payment').removeAttribute('style');
            getElementById('win_popup_receive_individual_payment').style.display = 'block !important';" >
     <span>ОТПРАВИТЬ</span>
   </a>
</div>

<div id="win_popup_receive_individual_payment" style="display:none;">
  <div class="overlay_popup_receive_individual_payment"></div>
  <div class="visible_popup_receive_individual_payment" id="visible_popup_receive_individual_payment">
  <form>
    <!-- different <input> -->
    <input type="submit" value="Отправить" onclick=" ... "><!-- some action -->
  </form>
  </div>
</div>

<div class="modall modall_form"  id="calk_modal" style="display: none" >
<?php get_template_part('receive_individual_payment_form'); ?>
   <a class='green-button'
      onClick="getElementById('win_popup_receive_individual_payment').removeAttribute('style');
     <span>ОТПРАВИТЬ</span>
   </a>
</div>