JavaScriptMVC's default Event functionality. This functionality should rarely be used.
In place of registering event handlers directly, you are HIGHLY encouraged to
create Controllers to handle event registration and callback in a very dry fassion.
If you use other libraries like prototype or jQuery, their functionailty will be mapped to these functions.
Example
The following calls checkForm on the form element with id 'signinForm' being submitted.
MVC.Event.observe(MVC.$E('signinForm'), 'submit', checkForm);