Compare and save on Guangzhou hotels

var ListPage = { maxTries: 20, interval: 0, xhrRequests: [], update: function(url, count, callback){ var fingerprint = "&t=" + (new Date().getTime()); var reqcount = "&req_count=" + count; this.loader("on"); var self = this; var req = new XMLHttpRequest(); req.open("GET", url + fingerprint + reqcount, true); ListPage.xhrRequests.push(req); req.onreadystatechange = function() { if (req.readyState === 4 && (req.status === 200 || req.status === 202)) { eval(req.responseText); self.loader("off"); if (req.status === 200 || req.status !== 202 ) callback(req.status); if (req.status === 202) { if (count < self.maxTries) { setTimeout(function(){ListPage.update(url, ++count, callback)}, self.interval); self.interval += 100; } else { callback(req.status); } } } }; req.send(null); }, loader: function(status) { var spinnerD = document.querySelector('.spinnersD'); var spinnerM = document.querySelector('.spinnersM'); if (spinnerD && spinnerM) { if (status === "on") { spinnerD.className = "spinnersD shownow"; spinnerM.className = "spinnersM shownow"; } else { // hide spinnerD.className = "spinnersD"; spinnerM.className = "spinnersM"; } } }, ajax: function(url, callback) { this.update(url, 1, callback); } }; ListPage.ajax("https://www.skyscanner.com/trip/hotels/hotel_list_page?action=index&clean_path=guangzhou&controller=topics&country_code=&current_user_id=&filters=&id=2000000015419&klass_name=Region&list_type=hotels&nearby=false&order=asc&path=guangzhou%2Fhotels&place=2000000015419&place_type=City&place_type=region&region=2000000015419&sort=best_value", function(status){ if (status === 200) { HotelRates.ajax(); } }); var HotelRates = { hotels: "hotel_ids%5B%5D=5000000336582&hotel_ids%5B%5D=5000000284961&hotel_ids%5B%5D=5000000148250&hotel_ids%5B%5D=5000000298692&hotel_ids%5B%5D=5000000344500&hotel_ids%5B%5D=5000000350766&hotel_ids%5B%5D=5000000701733&hotel_ids%5B%5D=5000001245147&hotel_ids%5B%5D=5000000281453&hotel_ids%5B%5D=5000000051108&hotel_ids%5B%5D=5000003708435&hotel_ids%5B%5D=5000000996283&hotel_ids%5B%5D=5000000338899&hotel_ids%5B%5D=5000000134972&hotel_ids%5B%5D=5000000344495&hotel_ids%5B%5D=5000000090893&hotel_ids%5B%5D=5000000167740&hotel_ids%5B%5D=5000000403804&hotel_ids%5B%5D=5000003775705&hotel_ids%5B%5D=5000000294848&hotel_ids%5B%5D=5000000307629&hotel_ids%5B%5D=5000000152726&hotel_ids%5B%5D=5000004856520&hotel_ids%5B%5D=5000000171009&hotel_ids%5B%5D=5000000242809&hotel_ids%5B%5D=5000000394013&hotel_ids%5B%5D=5000000699435&hotel_ids%5B%5D=5000003796226&hotel_ids%5B%5D=5000001244525&hotel_ids%5B%5D=5000000080498", ajaxCalls: function(tryIndex) { if (this.hotels) { ListPage.update("https://www.skyscanner.com/trip/hotels/hotel_rates_list?bookable_only=&country_code=&current_user_id=&locale=en&region=2000000015419" + "&" + this.hotels, tryIndex, function(){ var placeholder = document.querySelectorAll('.metasearch_featured .placeholder'); for (var i = 0; i < placeholder.length; i++) { placeholder[i].style.display='none'; } }); } }, ajax: function() { this.ajaxCalls(1); }, singleAjax: function() { this.ajaxCalls(ListPage.maxTries); } };