function setCookie(CookieName, CookieString, Expires ,timeUnit){
	if ((CookieName != null) && (CookieString != null)){
		if (Expires == null)
			document.cookie = CookieName + "=" + escape(CookieString)
		else{
			Expires = eval(Expires);
			setDay = new Date();
			if (timeUnit == null)
				timeUnit = "day";
				switch (timeUnit){
				case "week":
					setDay.setTime(setDay.getTime()+(Expires*1000*60*60*24*7));
					break;
				case "day":
					setDay.setTime(setDay.getTime()+(Expires*1000*60*60*24));
					break;
				case "hour":
					setDay.setTime(setDay.getTime()+(Expires*1000*60*60));
					break;
				case "minute":
					setDay.setTime(setDay.getTime()+(Expires*1000*60));
					break;
				case "second":
					setDay.setTime(setDay.getTime()+(Expires*1000));
					break;
				default:
				setDay.setTime(setDay.getTime()+(Expires*1000*60*60*24));
				}
				expTime = setDay.toGMTString();
				document.cookie = CookieName + "=" + escape(CookieString) + ";expires=" + expTime ;
			}
		return true;
		}
	return false;
}


function getCookie(CookieName){
	CookieName += "=";
	theCookie = document.cookie+";";
	start = theCookie.indexOf(CookieName);
	if(start != -1){
		End = theCookie.indexOf(";",start);
		return unescape(theCookie.substring(start+CookieName.length,End));
	}
}