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));

	document.cookie = NameOfCookie + "=" + escape(value) + ((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
}

function eraseCookie(name)
{
	setCookie(name,"",-1);
}