Cookie cookie = new Cookie("username", userId);
        	        cookie.setMaxAge(28800); // 8 hours
		        getMainWindow().getResponse().addCookie(cookie); 

Cookie[] cookies = getMainWindow().getRequest().getCookies();
	    	if (cookies != null) {
		        for (int i=0; i<cookies.length; i++) {
		        	logger.debug("cookies.getName="+cookies[i].getName());
		        	logger.debug("cookies.getValue="+cookies[i].getValue());
		            if ("username".equals(cookies[i].getName()))
		            	userIdField.setValue(cookies[i].getValue());
		        }