zk.historystate=function(){var o="state"in window.history,n=location.href;return{enabled:!0,onPopState:function(t){var e=!o&&location.href==n;o=!0,e||(t={state:t.state,url:location.href},zAu.send(new zk.Event(null,"onHistoryPopState",t,{implicit:!0}),1),zk.bmk.checkBookmark&&zk.bmk.checkBookmark())},register:function(){zk.historystate.enabled&&window.addEventListener("popstate",this.onPopState)}}}(),zk._apac(function(){zk.historystate.register()});