public LoginDialog(JFrame parent){
		succeeded = false;
		lbUsername = new JLabel("Username");
		tfUsername = new JTextField(10);
		lbPassword = new JLabel("Password");
		pfPassword = new JPasswordField(10);
		btnLogin = new JButton("Login");
		btnCancel = new JButton("Cancel");
		panel = new JPanel();

		this.getContentPane().add(panel);
		this.setSize(new Dimension(210, 130));
		this.setResizable(false);
		this.setTitle("Login");
		this.setLocationRelativeTo(null);

		btnLogin.addActionListener(
			new ActionListener() {
				@Override
				public void actionPerformed(ActionEvent e) {
					succeeded = Login.authenticate(getUsername(), getPassword());
					String text;
					if (succeeded)
						text = "Hi " + getUsername() + ", you've successfully logged in.";
					else
						text = "Wrong username and/or password.";
					JFrame response = new JFrame("Attention");
					JPanel okpanel = new JPanel();
					JLabel label = new JLabel(text);
					JButton okbtn = new JButton("OK");

					response.getContentPane().add(okpanel);
					okpanel.add(label);
					okpanel.add(okbtn);

					okbtn.addActionListener(
						new ActionListener() {

							@Override
							public void actionPerformed(ActionEvent arg0) {
								// TODO Auto-generated method stub
								response.dispose();
								if (succeeded) {

								}
							}

						}
					);

					response.setSize(new Dimension(250,100));
					response.setVisible(true);
					response.setLocationRelativeTo(null);
				}
			}
		);

		panel.add(lbUsername);
		panel.add(tfUsername);
		panel.add(lbPassword);
		panel.add(pfPassword);
		panel.add(btnLogin);
		panel.add(btnCancel);


	}