private void miLoadCourseMousePressed(java.awt.event.MouseEvent evt) {
    	Object[] courseNames = Manager.getInstance().getCourseNames().toArray();
    	String selectedCourse = (String) JOptionPane.showInputDialog(this, 
    	        "Select a course.",
    	        "Course Select",
    	        JOptionPane.QUESTION_MESSAGE, 
    	        null, 
    	        courseNames, 
    	        courseNames[0]);
    	
    	if (selectedCourse == null) { return; }
    	currentCourse = Manager.getInstance().getCourses().get(selectedCourse); 
    	loadCourse(Manager.getInstance().getCourses().get(selectedCourse));
    }