private String findExtra(String original){
		String s = original.substring(original.indexOf("filename=\"")+10);
		String file = "";
		if(s.indexOf("?B?")!=-1){
			s = s.substring(s.indexOf("?B?")+3);
			file = s.substring(s.indexOf("\n\n")+2);
			file = file.substring(0,file.indexOf("\n\n"));
			s = s.substring(0,s.indexOf("?="));
			try {
				s = new String(decoder.decodeBuffer(s),"GBK");

			} catch (IOException e1) {}
			return s+"\n\n"+file;
		}else{
			file = s.substring(s.indexOf("\n\n")+2);
			file = file.substring(0,file.indexOf("\n\n"));
			s = s.substring(0,s.indexOf("\""));

			return s+"\n\n"+file;
		}
		
	}