How to find event listeners on a DOM node in JavaScript or in debugging?

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:

• Prototype's Event.observe;

• DOM's addEventListener;

• As element attribute element.onclick.

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

Update: Visual Event 2 available.

Stack Overflow Q#446892, score: 541