function ReadCookie(cookieName) {
 var theCookie=""+document.cookie;
 var ind=theCookie.indexOf(cookieName);
 if (ind==-1 || cookieName=="") return ""; 
 var ind1=theCookie.indexOf(';',ind);
 if (ind1==-1) ind1=theCookie.length; 
 return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}

function SetCookie(cookieName,cookieValue) {
 document.cookie = cookieName+"="+escape(cookieValue)+"; path=/";
}

function deletecookie(name) {
document.cookie = name+"=<br>;expires=Thu, 01-Jan-70 00:00:01 GMT;";
} 

function verifyage(){
	var mydestination = "index.php";
	if (document.getElementById("mycountry").value=="Africa"){min_age = 18; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="Americas"){min_age = 18; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="Canada"){min_age = 19; mybad="http://www.educalcool.qc.ca";}
	if (document.getElementById("mycountry").value=="Mexico"){min_age = 18; mybad="http://www.alcoholinformate.org.mx";}
	if (document.getElementById("mycountry").value=="United States"){min_age = 21; mybad="http://www.centurycouncil.org ";}
	if (document.getElementById("mycountry").value=="Asia"){min_age = 21; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="Europe"){min_age = 21; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="Germany"){min_age = 18; mybad="http://www.spirituosen-verband.de";}
	if (document.getElementById("mycountry").value=="Portugal"){min_age = 16; mybad="http://www.esb.ucp.pt/lasvin/";}
	if (document.getElementById("mycountry").value=="Spain"){min_age = 18; mybad="http://www.alcoholysociedad.org";}
	if (document.getElementById("mycountry").value=="United Kingdom"){min_age = 18; mybad="http://www.drinkaware.co.uk";}
	if (document.getElementById("mycountry").value=="Oceania"){min_age = 21; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="Australia"){min_age = 18; mybad="http://www.icap.org";}
	if (document.getElementById("mycountry").value=="New Zealand"){min_age = 18; mybad="http://drinkwise.com.au/";}
	if (document.getElementById("mycountry").value=="Other"){min_age = 18; mybad="http://www.icap.org";}

	var year = parseInt(document.getElementById("myyear").value);
	var month = parseInt(document.getElementById("mymonth").value) - 1;
	var day = parseInt(document.getElementById("myday").value);
	var theirDate = new Date((year + min_age), month, day);
	var today = new Date;
	if ( (today.getTime() - theirDate.getTime()) < 0) {
		window.location = mybad;
		return false;
	} else {
		SetCookie("amilegal","yesiamlegal");
		
		var CookieResult;
		CookieResult = ReadCookie("storepage");
		if(CookieResult != ""){
			deletecookie("storepage");
			window.location = CookieResult;
			return false;
		}else{
			return true;
		}
	}				 
	
}

<!-- set the cookie 'storepage' to go to the initial store page the customer was trying to open -->
if(document.referrer != ''){
	var aURL = document.referrer;
	var aPosition = aURL.indexOf("jimbeamstore.com");
	if(aPosition > 8){
		SetCookie("storepage",aURL);
	}
}

<!-- if coming from jimbeam.com, automatically go to index.php -->
if(document.referrer != ''){
	var aURL = document.referrer;
	var aPosition = aURL.indexOf("jimbeam.com");
	if(aPosition > 4){
		SetCookie("amilegal","yesiamlegal");//set the age cookie so the inside store pages will load
		var CookieResult;
		CookieResult = ReadCookie("storepage");
		if(CookieResult != ""){
			deletecookie("storepage");
			window.location = CookieResult;
		}else{
			window.location = "index.php";
		}
	}
}

<!-- check the cookie 'amilegal' and go to index.php if it's set -->
var AgeCookieResult;
AgeCookieResult = ReadCookie("amilegal");
if(AgeCookieResult == "yesiamlegal"){
	var CookieResult;
	CookieResult = ReadCookie("storepage");
	if(CookieResult != ""){
		deletecookie("storepage");
		window.location = CookieResult;
	}else{
		window.location = "index.php";
	}
}