Small UserJS for Posters

Recently, an option has appeared on the Poster that allows you to minimize information about the cinemas in which the film is shown. But unfortunately, by default, all the films are deployed, to me personally, this seems inconvenient.
It is because of this that I decided to write this script, I am not familiar with js so badly, so perhaps the same can be done more optimally, if someone prompts, I will be only grateful.
Perhaps this script is useful to someone =)
If you do not need it, please do not kick much, my first userjs.

Reference
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PS I wrote for the Opera, and checked only on it. I did not try it on other browsers, but if I find the script necessary for someone, I will try to do it for FF.