Could I find the function invoked by an event in run-time?

I want to find that when a user fires an e开发者_JAVA百科vent, such as click a button, what function(s) does this event invoke at run-time? Would it be possible?

Thanks!

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interesting question. add some debugging alert(), you will know what functions are triggered.

p.s. actually, the "function" you mean is the JavaScript internal function or the user-defined functions?