function getCookie(NameOfCookie) { 
	
	if (document.cookie.length > 0) { 
	
		begin = document.cookie.indexOf(NameOfCookie + '=');
		
		if (begin != -1) { 
			
			begin += NameOfCookie.length+1;
			end = document.cookie.indexOf(";", begin);
			
			if (end == -1) end = document.cookie.length;
			
			return unescape(document.cookie.substring(begin, end)); 
			
		}
		
	}
	
	return null;
	
}

function setCookie(NameOfCookie, value, expiredays) {

	var ExpireDate = new Date ();
	
	ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000));
	cookie = NameOfCookie + "=" + escape(value) +         
	((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
	cookie += '; path=/;';
	document.cookie = cookie;
	
}

function cookieExists(cookieName){
	
	if(getCookie(cookieName) != null){
		
		return true;
		
	} else {
		
		return false;
		
	}
	
}

function delCookie (NameOfCookie) { 

	if (getCookie(NameOfCookie)) document.cookie = NameOfCookie + "=" + "; path=/; expires=Thu, 01-Jan-70 00:00:01 GMT";
	
}