var iframe = document.createElement("iframe");
document.getElementById('frame_form').appendChild(iframe);
iframe.id = 'frame_ticket_form';
iframe.style.width = "100%";
iframe.style.border = "none";
iframe.scrolling = "no";
iframe.src = 'https://sale.nika-bus.com.ua/';
window.addEventListener('message', function (e) {
    iframe.height = e.data;
});