About form standard events
Note:  This topic presents information about the
            Mongoose form event model, as opposed to the
         Application Event System. The primary difference between the two is that form events are
         operational only within a single form, whereas application events can be used
         application-wide. 
      This application generates and handles many standard events as the user interacts with forms and components. The triggering of one standard event often involves a chain of standard events that all execute in sequence. This is why it is often most advantageous to use standard events whenever possible, rather than creating custom events (for which you must create your own chain/sequence of event handlers).