var ytcsi = {gt: function(n) {n = (n || '') + 'data_';return ytcsi[n] || (ytcsi[n] = {tick: {},span: {},info: {}});},tick: function(l, t, n) {ytcsi.gt(n).tick[l] = t || +new Date();},span: function(l, s, e, n) {ytcsi.gt(n).span[l] = (e ? e : +new Date()) - ytcsi.gt(n).tick[s];},setSpan: function(l, s, n) {ytcsi.gt(n).span[l] = s;},info: function(k, v, n) {ytcsi.gt(n).info[k] = v;},setStart: function(s, t, n) {ytcsi.info('yt_sts', s, n);ytcsi.tick('_start', t, n);}};(function(w, d) {ytcsi.perf = w.performance || w.mozPerformance ||w.msPerformance || w.webkitPerformance;ytcsi.setStart('dhs', ytcsi.perf ? ytcsi.perf.timing.responseStart : null);var isPrerender = (d.visibilityState || d.webkitVisibilityState) == 'prerender';var vName = d.webkitVisibilityState ? 'webkitvisibilitychange' : 'visibilitychange';if (isPrerender) {ytcsi.info('prerender', 1);var startTick = function() {ytcsi.setStart('dhs');d.removeEventListener(vName, startTick);};d.addEventListener(vName, startTick, false);}if (
