ga(function (tracker) { // Gets the client ID of the default tracker. var clientId = tracker.get('clientId'); // Gets the Checkfront iframe. var checkfrontIframe = document.getElementById('CHECKFRONT_WIDGET_01').getElementsByTagName('iframe')[0]; // Sends the client ID to the window inside the destination frame, once it's loaded. checkfrontIframe.addEventListener("load", function () { this.contentWindow.postMessage(clientId, 'https://thingstodoglobal.checkfront.com'); }); });
 
San-Diego-Zoo-and-Safari-Park-Discounted-tickets.jpg