var COOKIE_NAME = "last_page";

function setCookie (cookieName, cookieValue, expires, path, domain, secure) {
	document.cookie =
		escape(cookieName) + '=' + escape(cookieValue)
		+ (expires ? '; EXPIRES=' + expires.toGMTString() : '')
		+ (path ? '; PATH=' + path : '')
		+ (domain ? '; DOMAIN=' + domain : '')
		+ (secure ? '; SECURE' : '');
}

function getCookie (cookieName) {
	var cookieValue = null;
	var posName = document.cookie.indexOf(escape(cookieName) + '=');
	if (posName != -1) {
		var posValue = posName + (escape(cookieName) + '=').length;
		var endPos = document.cookie.indexOf(';', posValue);
		if (endPos != -1)
			cookieValue = unescape(document.cookie.substring(posValue,endPos));
		else
			cookieValue = unescape(document.cookie.substring(posValue));
	}
	return cookieValue;
}

function recordCookie(){
	var url = document.location;
	setCookie(COOKIE_NAME, url);
}

function goCookie(){
	var url = "";
	url = getCookie(COOKIE_NAME);
	if(url==null || url==""){
		url = location.protocol + "//" + location.host;
	}
	location = url;
}