Expand/collapse Floating Layer with JavaScript

Floats a menu on the screen so that it stays in place
while a user scrolls or uses the On-page Navigation.



On-page image 1.

source code image




On-page image 2.





On-page section 3.

image of a Wild Horse



On-page section 4.

image of animated arrow




On-page section 5.


animated music



On-page section 6.

image of animated-gif