How to trigger an automatically created button after page load?

How to trigger an automatically created button after page load?

Hi

i wanted to make a script which always pushes a certain dynamic created button on IMDB.
i'm speaking of the "add to XY list..." button which can be found under each movie page on imdb (for example: http://www.imdb.com/title/tt0106519/?ref_=hm_rec_tti).
The button can be found in the dropdown list next to the button "+ Watchlist". (only of course one is logged in and has at least one additional list next to the default watchlist)

So what i want is that when i open such a movie page it should automatically push this button which adds the movie to my list. I'm using tampermonkey, but fail to get the jquery right.




the html structure of the corresponding code is attached. The highlighted line corresponds to my list "wachted".

thanks for any advice