How to get notified about DOM changes with javascript?

Question

I have a third party javascript app on my site that uses a lot jquery and ajax. Is there a way to get the element in the DOM, in which an manipulation has occured by javascript or ajax or jquery?

I need to intercept these dom changes and inspect these in order to replace some strings (localization purpose).

Answer 1

This gets asked a lot. See this question, for instance. If you search (which you should before posting), you will be able to find more.