function getCookie(name) {
	var cookies = document.cookie;
	var start = cookies.indexOf(name + '=');
	if (start == -1) return null;
	var len = start + name.length + 1;
	var end = cookies.indexOf(';', len);
	if (end == -1) end = cookies.length;
	return unescape(cookies.substring(len, end));
}

function setCookie(name, value, expires, path, domain, secure) {
	value   = escape(value);
	expires = (expires) ? ';expires=' + expires.toGMTString() :'';
	path    = (path)    ? ';path='    + path                  :'';
	domain  = (domain)  ? ';domain='  + domain                :'';
	secure  = (secure)  ? ';secure'                           :'';
	
	document.cookie = name + '=' + value + expires + path + domain + secure;
}

function deleteCookie(name, path, domain) {
	var expires = ';expires=Thu, 01-Jan-70 00:00:01 GMT';
	(path)    ? ';path='    + path                  : '';
	(domain)  ? ';domain='  + domain                : '';
	
	if (getCookie(name)) document.cookie = name + '=' + expires + path + domain;
}

function isCookieEnabled() {
	var exp = new Date();
	var oneDay = exp.getTime() + (60 * 1000);
	exp.setTime(oneDay);
    setCookie('temp','temp', exp);
    if (getCookie('temp')) return true;
    else return false;
}

function calculateExpirationDate(numberOfDays) {
	var today = new Date();
	var expire = new Date();
	if (numberOfDays == null || numberOfDays == 0) numberOfDays = 1;
	expire.setTime(today.getTime() + 3600000 * 24 * numberOfDays);
	return expire;
}