// "Internal" function to return the decoded value of a cookie

	//

	function getCookieVal (offset) {

	  var endstr = document.cookie.indexOf (";", offset);

	  if (endstr == -1)

		endstr = document.cookie.length;

	  return unescape(document.cookie.substring(offset, endstr));

	}



	//

	//  Function to return the value of the cookie specified by "name".

	//    name - String object containing the cookie name.

	//    returns - String object containing the cookie value, or null if

	//      the cookie does not exist.

	//

	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;

	}



	//

	//  Function to create or update a cookie.

	//    name - String object object containing the cookie name.

	//    value - String object containing the cookie value.  May contain

	//      any valid string characters.

	//    [expires] - Date object containing the expiration data of the cookie.  If

	//      omitted or null, expires the cookie at the end of the current session.

	//    [path] - String object indicating the path for which the cookie is valid.

	//      If omitted or null, uses the path of the calling document.

	//    [domain] - String object indicating the domain for which the cookie is

	//      valid.  If omitted or null, uses the domain of the calling document.

	//    [secure] - Boolean (true/false) value indicating whether cookie transmission

	//      requires a secure channel (HTTPS).  

	//

	//  The first two parameters are required.  The others, if supplied, must

	//  be passed in the order listed above.  To omit an unused optional field,

	//  use null as a place holder.  For example, to call SetCookie using name,

	//  value and path, you would code:

	//

	//      SetCookie ("myCookieName", "myCookieValue", null, "/");

	//

	//  Note that trailing omitted parameters do not require a placeholder.

	//

	//  To set a secure cookie for path "/myPath", that expires after the

	//  current session, you might code:

	//

	//      SetCookie (myCookieVar, cookieValueVar, null, "/myPath", null, true);

	//

	function SetCookie (name, value) {

	  var argv = SetCookie.arguments;

	  var argc = SetCookie.arguments.length;

	  var expires = (argc > 2) ? argv[2] : null;

	  var path = (argc > 3) ? argv[3] : null;

	  var domain = (argc > 4) ? argv[4] : null;

	  var secure = (argc > 5) ? argv[5] : false;

	  document.cookie = name + "=" + escape (value) +

		((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +

		((path == null) ? "" : ("; path=" + path)) +

		((domain == null) ? "" : ("; domain=" + domain)) +

		((secure == true) ? "; secure" : "");

	}



	//  Function to delete a cookie. (Sets expiration date to current date/time)

	//    name - String object containing the cookie name

	//

	function DeleteCookie (name) {

	  var exp = new Date();

	  exp.setTime (exp.getTime() - 1);  // This cookie is history

	  var cval = GetCookie (name);

	  document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

	}