The Online Megastorendow.msPerformance || window.webkitPerformance;ytcsi.tick('_start', ytcsi.perf ? ytcsi.perf.timing.responseStart : null);if (document.webkitVisibilityState == 'prerender') {ytcsi.info('prerender', 1);document.addEventListener('webkitvisibilitychange', function() {ytcsi.tick('_start');}, false);}