function clearCookie(cookieName) {

	var now = new Date();

	var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);

	this.setCookie(cookieName, 'cookieValue', yesterday);
}



// [Cookie] Sets value in a cookie
  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' : '');

}



// [Cookie] Gets a value from a cookie

 function getCookie(cookieName) {

	var cookieValue = '';

	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 updateCookie(cookieName, cookieValue){
	setCookie(cookieName,cookieValue);
}