changing inserted jpg without reloading page?

changing inserted jpg without reloading page?

I have a fixed background photo (css)
I only need to add three buttons on left side at a specific locations
that will change a picture within a frame on the right side.
3 button, one of 3 jpg displayed.
NO reloading of page.
Any suggested scripts with demo you can suggest?
It has been over 12 years since I have do website building
but a little cut/paste of something similar will get my head working again.
I do have a basic css webpage with some transparent links I was playing with.
Thanks,
Ray