(function(){
	"use strict";

	//determine if user is accessing from mainland China
	window.isChina = window.isChina || document.cookie.indexOf('GeoIPCookie=GEOIP_COUNTRY_CODE=CN')>-1;

	if(window.isChina && document.cookie.indexOf('prcNoticeAccepted=true') < 0){
		//cookie not found, china user.
		//get banner
		var banner = document.getElementById('prcNoticeBanner');
		var acceptButton = document.getElementById('prcNoticeBannerAccept');

		//show banner
		banner.style.display = "block";

		acceptButton.onclick = function(event){
			//save the acceptance cookie
			//cookie valid for 30 days/1 month
			var d = new Date();
			d.setTime(d.getTime() + (30*24*60*60*1000));

			//figure out the domain
			var cookieDomain = window.location.hostname;
			var domainParts = cookieDomain.split('.');
			var firstPart = domainParts[0];

			if( !isNumeric(firstPart)  &&  (cookieDomain.indexOf("local")<0)  &&  (domainParts.length > 1) ){
				cookieDomain = '.' + domainParts.slice(domainParts.length -2).join('.');
			}

			//save the cookie value
			document.cookie = 'prcNoticeAccepted=true;path=/;expires=' + d.toUTCString() + ';domain='+cookieDomain;
			banner.style.display = "none";

			//stops the click
			return false;
		};
	}

	function isNumeric(item){
		return !isNaN(parseFloat(item)) && isFinite(item);
	}

})();