@Override
    public void initialize(URL url, ResourceBundle rb) {
        listViewHelp.getSelectionModel().selectedItemProperty().addListener(
                new ChangeListener<String>() {
                    @Override
                    public void changed(ObservableValue<? extends String> ov, String t, String t1) {
                        String temp = "";
                        System.out.println(listViewHelp.getSelectionModel().getSelectedIndex());
                        switch (listViewHelp.getSelectionModel().getSelectedIndex()){
                            case 0: 
                                temp = "To add an item to the cart, first start a new sale. Next, choose the item"
                                        + " you wish to have by clicking on it in the catalog. In the right pane, "
                                        + "choose the add item button. The cart can be viewed by selecting the "
                                        + "'View Cart' tab.";
                                break;
                            case 1:
                                temp = "Enter the Sale ID in the text box and press the Get Order button. "
                                        + "You can remove items from the order by selecting them and pressing the Remove Selected "
                                        + "button. The new values for price will be reflected at the bottom of the screen. "
                                        + "Press the Checkout button to finalize the order.";
                                break;


                            case 2:
                                temp = "Enter the Sale ID in the text box and press the Get Order button. "
                                        + "You can remove items from the order by selecting them and pressing the Remove Selected "
                                        + "button. The new values for price will be reflected at the bottom of the screen. "
                                        + "Press the Checkout button to finalize the order.";
                                break;

                            case 3:
                                temp = "Sorry, Void Sale not implimented.";
                                break;
                            case 4:
                                temp = "To print a receipt enter the sale ID of the order and press the Get Order button. "
                                        + "Press the print button to print the receipt.";
                                break;
                            case 5:
                                
                        }
                        textAreaHelp.setText(temp);
                    }
                });
    }