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) {	//while open
	  var j = i + alen;
	  if (document.cookie.substring(i, j) == arg)
		 return getCookieVal (j);
	  i = document.cookie.indexOf(" ", i) + 1;
	  if (i == 0) break; 
   }	//while close
   return null;
}

function SetCookie (name, value) {
   var argv = SetCookie.arguments;
   var argc = SetCookie.arguments.length;
   var expires = (2 < argc) ? argv[2] : null;
   var path = (3 < argc) ? argv[3] : null;
   var domain = (4 < argc) ? argv[4] : null;
   var secure = (5 < argc) ? argv[5] : false;
   document.cookie = name + "=" + escape (value) +
	  ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
	  ((path == null) ? "" : ("; path=" + path)) +
	  ((domain == null) ? "" : ("; domain=" + domain)) +
	  ((secure == true) ? "; secure" : "");
}