/**
 * PERSISTENCE_MILLIS - int 
 * How long to save the tree state between visits.
 */
var MS_PER_DAY  =  1000 * 60 * 60 * 24;
//var PERSISTENCE_MILLIS  =  1 * MS_PER_DAY; // 1 day
var PERSISTENCE_MILLIS  =  -1//  Session Cookie
//-----END PERSISTENCE USER PARAMS--------------
// this function fires onload.
fireOnload( function() {
	// Change the parameter "nav" to match the id of your tree.
		saveTreeOnUnload("nav");
		restoreTreeState("nav", null);
});