//******************************************************************************
 //  Cookie Functions -- "Night of the Living Cookie" Version (25-Jul-96)
 //  Written by:  Bill Dortch, hIdaho Design <bdortch@hidaho.com>
 
 
 //  "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 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,expires,path,domain,secure) {
	document.cookie = name + "=" + escape (value) +
	  ((expires) ? "; expires=" + expires.toGMTString() : "") +
	  ((path) ? "; path=" + path : "") +
	  ((domain) ? "; domain=" + domain : "") +
	  ((secure) ? "; secure" : "");
 }
 
 
 //  Function to delete a cookie. (Sets expiration date to start of epoch)
 //    name -   String object containing the cookie name
 //    path -   String object containing the path of the cookie to delete.
 //             This MUST be the same as the path used to create the cookie, or
 //             null/omitted if no path was specified when creating the cookie.
 //    domain - String object containing the domain of the cookie to delete.
 //             This MUST be the same as the domain used to create the cookie, or
 //             null/omitted if no domain was specified when creating the cookie.
 //
 function DeleteCookie (name,path,domain) {
	if (GetCookie(name)) {
	  document.cookie = name + "=" +
		 ((path) ? "; path=" + path : "") +
		 ((domain) ? "; domain=" + domain : "") +
		 "; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
 }