How to find event listeners on a DOM node when debugging or from the JavaScript code?

I have a page where some event listeners are attached to input boxes and select boxes. Is there a way to find out which event listeners are observing a particular DOM node and for what event?

Events are attached using:

1. Prototype's Event.observe;


2. DOM's addEventListener;


3. As element attribute element.onclick.

Answer

If you just need to inspect what's happening on a page, you might try the Visual Event bookmarklet.

Update: Visual Event 2 available;