public boolean showModifyDialog(Student student) {
		this.setTitle("޸");
		canceled = false;
		this.editingNo = student.no;
		no.setText(student.no);
		name.setText(student.name);
		sex.setSelectedItem(student.sex);

		Calendar cal = Calendar.getInstance();
		cal.setTimeInMillis(student.birthday.getTime());
		int year, month, day;
		year = cal.get(Calendar.YEAR);
		month = cal.get(Calendar.MONTH) + 1;
		day = cal.get(Calendar.DATE);
		this.year.setSelectedItem(year);
		this.month.setSelectedItem(month);
		this.setDay(this.getDaysOfMonth(year, month));
		this.day.setSelectedItem(day);

		address.setText(student.address);
		tel.setText(student.tel);
		email.setText(student.email);
		this.getRootPane().setDefaultButton(button);
		this.setVisible(true);
		return !canceled;
	}