I was able to implement this clickable dropdown once into my page: https://www.w3schools.com/howto/howto_js_dropdown.asp
However, when trying to add it to a second page it doesn't seem to work.
For background my page is 1 html file that is divided into article sections. In 1 section I was able to put this in and have it work for that articles page. However, when doing it for another article section although the button shows up, its clickable functions don't work. I click but nothing happens. I copied and pasted the code from the other article section there and changed the options to reference the things on the page i wanted them to jump to, so it is still calling the proper script and using the same css styling, but it doesn't drop down and show me the options.
Also if I comment out the other article section's dropdown, then the 2nd page works, but otherwise it does not.
Could someone please point out what I am missing and why it works on the one page still but not the other.