public static void newMappingSession() {
		long newSession = System.currentTimeMillis();
		String date = Utils.sessdate(newSession);
		try {
			if(Config.autoSaveMinimaps){
			(new File("map/" + date)).mkdirs();
			Writer currentSessionFile = new FileWriter("map/currentsession.js");
			currentSessionFile.write("var currentSession = '" + date + "';\n");
			currentSessionFile.close();}
			mappingSession = newSession;
			gridsHashes.clear();
			coordHashes.clear();
		} catch (IOException ex) {
		}
	}