Javascript Events: Getting notified of changes in an <input> control value

Question

I have the following problem:

I have an HTML textbox () whose contents are modified by a script I cannot touch (it is my page

Answer 1

addEventListener("DOMControlValueChanged" will fire when a control's value changes, even if it's by a script.

addEventListener("input" is a direct-user-initiated filtered version of DOMControlValueChanged.

Unfortunately, DOMControlValueChanged is only supported by Opera currently and input event support is broken in webkit. The input event also has various bugs in Firefox and Opera.

This stuff will probably be cleared up in HTML5 pretty soon, fwiw.

Update:

As of 9/8/2012, DOMControlValueChanged support has been dropped from Opera (because it was removed from HTML5) and 'input' event support is much better in browsers (including less bugs) now.