@Override
		public void focusLost(FocusEvent evt) {
			if (evt.getSource()==buynumber){
				if (buynumber.getText().equals("")) buynumber.setText("0");			
			}
			if (evt.getSource()==sellnumber){
				if (sellnumber.getText().equals("")) sellnumber.setText("0");			
			}
		}