SIMULATING EVENTS
Events are designed to indicate particular moments of interest in a web page. These events are often fired based on user interaction or other browser functionality. It's a little-known fact that JavaScript can be used to fire specific events at any time, and those events are treated the same as events that are created by the browser. This means that the events bubble appropriately and cause the browser to execute event handlers assigned to deal with the event. This capability can be extremely useful in testing web applications. The DOM Level 3 specification indicates ways to simulate specific types of events. Internet Explorer 8 and earlier versions have their own way to simulate events.
DOM Event Simulation
An event object can be created at any time by using the createEvent() method on document. This method accepts a single argument, which is a string indicating the type of event to create. In DOM Level 2, all of these strings were plural, while DOM Level 3 changed...
