var count=0;
test.onclick=function(){
	count++;
	if(count>2)
		document.getElementById('test').style.display='none';
};

var version='5.4.3.5';
self.addEventListener('install',function(ev){
	ev.waitUntil(caches.open(version).then(function(cache){
		if(location.protocol=='http:'||location.protocol=='https:'){
			return fetch('/resource.json').then(function(res){
				return res.json();
			}).then(function(files){
				return cache.addAll(files);
			});
		}
	}));
	self.skipWaiting();
});
self.addEventListener('activate',function(ev){
	ev.waitUntil(caches.keys().then(function(keyList){
		return Promise.all(keyList.map(function(key){
			if(version!=key){
				return caches.delete(key);
			}
		}));
	}));
});
self.addEventListener('fetch',function(ev){
	ev.respondWith(caches.match(ev.request).then(function(res){
		return res||fetch(ev.request).then(function(res){
			var resToCache=res.clone(),
				newHeaders=new Headers(resToCache.headers);
			newHeaders.append('X-Powered-By','nginx');
			var anotherResponse=new Response(resToCache.body,{
					status: resToCache.status,
					statusText: resToCache.statusText,
					headers: newHeaders
				});
			caches.open(version).then(function(cache){
				if(ev.request.method!='POST'&&(new URL(ev.request.url).protocol=='http:'||new URL(ev.request.url).protocol=='https:')){
					cache.put(ev.request,anotherResponse);
				}
			});
			return res;
		}).catch(function(){
			return caches.match('/offline.html');
		});
	}));
});