Total beginner - Loading new .html in DIV when link clicked

Total beginner - Loading new .html in DIV when link clicked

What I'm trying to do is simple to describe, but apparently hard to actually do (at least for me).

I want to replicated the target="_self" functionality that frames offer, only in CSS with DIVs.

Currently, an html page is loading in a DIV. In this html page, there is links to more content. I would like click on said links, and have a different .html page load in the same DIV the original content.

It's probably very simple, but I'm clueless. Any help would be greatly appreciated!