private String getLatestNewsUrl() {
        String s = "";
        BufferedReader reader = getWebsite(DHBW_URL);       //go tho the dhbw-homepage
        try {
            while (s != null & !s.contains(DHBW_MORE_TAG)) {    //this tag is used to display news items
                s = reader.readLine();
            }
            if (s == null) {
                return s;
            }
            s = s.substring(s.indexOf(DHBW_NEWURL_START) + DHBW_NEWURL_START.length(), s.indexOf(DHBW_NEWURL_END)); //get the last part of the url to the news item
            latestUrlNo = Integer.parseInt(s);
            if (latestUrlNo <= lastLatestUrlNo) {   //if the latest news is in the backup return null to indicate that
                return null;
            }
            reader.close();
            return DHBW_AKTUELLES_URL + s;
        } catch (Exception ex) {
            try {
                reader.close();
            } catch (Exception e) {
            }
            return null;
        }
    }