public void updateComboBox()
	{
		// first, remove all items previously in combo box
		refComboBox.removeAllItems();

		// then, populate the combo box with the names of referees
		// stored in the RefereeClass list of RefereeProgram
		for (int x = 0; x < refereeProgram.getelementsInArray(); x++)
			refComboBox.addItem(refereeProgram.getRefereeClassAtX(x).getRefereeName());
	}