Horizontal scrolling and vertical scrolling

Is it possible to have both for one site while using the anchor tags?

I have already set up a website that does horizontal scrolling for each parent page. Some of these parent pages has child pages in sections that I will like to have scroll vertically to on that page with a sub menu on top.

I know I will have to use Javascript for this, but I was wondering what I need to do in the function to differentiate the horizontal scrolling for the parent pages with the vertical scrolling for the parent page’s sub sections.