Good evening guys! I'm doing a school system, it will have access levels, menu for each access. I want to do the following, when I click on some option from the side menu, where it is written "BLANK" in the middle part, I want to appear the corresponding page, without changing page. Anyway, I did some previous applications with ajax, but it was not so good, I heard Angular and such, could you give me a direction? If you can only do it with ajax, or what angle is there for it? Well, I do not quite understand what it does, and if there is a framework for it, thank you in advance!