private void showHowTo(ActionEvent evt) {
		JEditorPane editorPane = new JEditorPane();
		editorPane.setEditable(false);
		java.net.URL howToUrl = null;
		try {
			howToUrl = new java.net.URL("http://cse.unl.edu/~zsims/howTo.html");
		} catch (MalformedURLException e) {
		}
		try {
	        editorPane.setPage(howToUrl);
	    } catch (IOException e) {
	        System.err.println("Attempted to read a bad URL: " + howToUrl);
	    }
	    JOptionPane.showMessageDialog(this, editorPane);
    }