JS Adaptation of Mega Menu

I have made a JScript (JavaScript that runs on Windows) adaptation of Prof. Pickle's Mega Menu.
This took me about a week to finish. To run, paste the code into whatever text editor you like (Notepad, etc.) and save it as a .js file. Now go to the folder the file was saved in, open Command Prompt and type:
cscript //nologo <name of file>.js
I would usually put the code right here, but due to some encoding and file size issues I will have to instead put it as a Google Drive link right here
I have to apparently have a cover image and image in the introduction, so I will put an image of a kangaroo for both of those.
Changelog
This project still does not have all the features of the latest Mega Menu (V2.5), suggestions are greatly appreciated from anyone.