private String getPicture(BufferedReader reader) {
        String s = null;
        do {  //go to the text passage in the html-code
            try {
                s = reader.readLine();
            } catch (Exception e) {
            }
        } while (s != null && !s.contains(DHBW_PICTURE_TAG));
        if (s == null || !s.contains(".jpg")) {
            return null;
        }
        try {
            s = DHBW_URL + s.substring(s.indexOf(DHBW_PICTURE_TAG) + DHBW_PICTURE_TAG.length() + 1, s.indexOf(".jpg")) + ".jpg";
        } catch (Exception e) {
        }
        return s;
    }