@Override
		public void actionPerformed(ActionEvent event) {
			if(event.getActionCommand().equals("Add")){
				String userkey = username.getText().toString();
				String passkey = password.getText().toString();
				String mess = user_dao.regisUser(userkey, passkey);

				if(!userkey.equals(""))	{

					message.setText(mess);
					username.setText("");
					password.setText("");
					if(mess.contains("REGIS_SUCCESS"))
						model.addRow(new Object[]{userkey}); 
				}
				
			}
			else if(event.getActionCommand().equals("Delete")){
				String userkey = username.getText().toString();
				String passkey = password.getText().toString();
				String mess = user_dao.deleteUser(userkey, passkey);
				message.setText(mess);
				username.setText("");
				password.setText("");
				int length = model.getRowCount();
				for(int i=0;i<length;i++){
					if(model.getValueAt(i, 0).toString().equals(userkey)){
						model.removeRow(i);
						break;
					}
				}
			}
			
		}