I'm not very knowledgable with js at all but I'm trying. I've copied some script from a downloaded thing which works on my computer but not on the website. I can't work out what's wrong. This is a little section of it. The problem is that when I put the mouse on the Introduction title, the dropdown menu doesn't show.

If anyone can help I'd be extremely grateful.

P.S. Perhaps, I've put all the coding in the wrong place. I will add more if what there is isn't sufficient.