javascript – Notes tool for call center agents

I have been working on a notes tool for my company to help simplify the verification and registration of accounts. I have added in additional features that help with different aspects of the job as well.

I wonder if there is anything I can do to simplify some of the functions I created.

Such as the "preload options." They take the contents of hidden divs and they are added to the text boxes of the notes. I'm sure there's a better way to do it, but I think I've been watching it for too long.

Any comment is welcomed!

I have removed any reference to the company to avoid any problem of publishing that information.

Too big to paste here:
https://pastebin.com/pdYH2DMq