var systemUrl = 'https://reservation.hisight.nl';
    var systemUrlJs = 'https://reservation.hisight.nl/api/w-js';
    createBaseScript();
    function createBaseScript() { 
      var time = Date.now();
      var script = document.createElement('script');
      script.src = systemUrlJs + '?type=base&token=fC3f...&t=' + time + '&iframeHeight=600&iframeWidth=376';
      window.document.body.appendChild(script);
    }