function SetCookie(cookieName,cookieValue,nDays) {
	var today = new Date();
	var expire = new Date();
	if (nDays==null || nDays==0) nDays=1;
		 expire.setTime(today.getTime() + 3600000*24*nDays);
		 document.cookie = cookieName+"="+escape(cookieValue)+ ";expires="+expire.toGMTString();
}

function getCookieVal(offset) {
	   var endstr = document.cookie.indexOf (";", offset);
	   if (endstr == -1) endstr = document.cookie.length;
		  return unescape (document.cookie.substring(offset, endstr));
}

function GetCookie(name) {
	   var arg = name+"=";
	   var alen = arg.length;
	   var clen = document.cookie.length;
	   var i = 0;
	   while (i < clen) {
		  var j = i + alen;
		  if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
		  i = document.cookie.indexOf(" ", i) + 1;
		  if (i == 0) break;
	   }
	   return null;
}