[Nexus]

<div class="hello" style="display:none" id="welcome-window">
	<div class="hellotext">
		<div align="center" class="logo">
			<img src="/logo.png" alt="" />
			Добро пожаловать!
		</div>
	</div>
</div>
<script>
(function(){
	const timestamp=new Date().getTime();//miliseconds
	const maxInactivePeriod=2;//hours
	const cookieName='welcome_window';
	let lastVisit;

	try{
		lastVisit=+(localStorage.getItem('lastVisit')||timestamp);
		localStorage.setItem('lastVisit',timestamp);
	}catch(e){
		lastVisit=timestamp;
		console.error(e);
	};

	if(
		lastVisit+maxInactivePeriod*3600*1000>timestamp && 
		document.cookie.indexOf(cookieName)>=0
	)
		return;

	const win=document.getElementById('welcome-window');
	if(!win)
		return;

	win.style.display='block';
	document.cookie='name='+cookieName+'; path=/;';
})();
</script>