public static String setTag(String s) {
                int j = s.length();
                StringBuffer stringbuffer = new StringBuffer(j + 500);
                char ch;
                for (int i = 0; i < j; i++) {
                        ch = s.charAt(i);
                        if (ch == '<') {
                                stringbuffer.append("&lt");
//                              stringbuffer.append("¡´");
                        } else if (ch == '>') {
                                stringbuffer.append("&gt");
//                              stringbuffer.append("¡µ");
                        } else if (ch == '&') {
                                stringbuffer.append("&amp");
//                              stringbuffer.append("¡¨");
                        } else if (ch == '%') {
                                stringbuffer.append("%%");
//                              stringbuffer.append("¡ù");
                        } else {
                                stringbuffer.append(ch);
                        }
                }

                return stringbuffer.toString();
        }