Booking.com

(function(d, sc, u) {
var s = d.createElement(sc), p = d.getElementsByTagName(sc)[0];
s.type = 'text/javascript';
s.async = true;
s.src = u + '?v=' + (+new Date());
p.parentNode.insertBefore(s,p);
})(document, 'script', '//aff.bstatic.com/static/affiliate_base/js/flexiproduct.js');