private String filtedString(String instr) {
		if ((null == instr) || (instr.length() == 0))
			return "";
		String str = "";
		str = instr;
		String strSYMBOL = "`-=[]\\;',./~!@#$%^&*()_+{}|:\"<>?\r\n\t ";
		str = str.replace("&nbsp", "");
		for (int i = 0; i < strSYMBOL.length(); i++) {
			String oldC = strSYMBOL.substring(i, i + 1);
			str = str.replace(oldC, "");
		}
		return str;
	}