Not a question, not an insult. It's a statement of fact. You should get used to it on this site. Especially if you spread nonsense.
What you're describing is not Ajax. It's just JavaScript.
Mootools, jQuery, Prototype, etc. Some JavaScript libraries have Ajax capabilities, but they are not Ajax. Ajax is "Asynchronous JavaScript And XML" which uses the XMLHttpRequest object to make server requests without the need to reload the page each time. Ajax has nothing to do with JavaScript effects, though the two are often used in tandem.
EDIT
To answer the original post...
I think you want a horizontal scrolling site that uses the mouse wheel to go side-to-side instead of up-and-down?
I've never done that - or even considered it (I think horizontal sites are a usability problem and an empty gimmick), but you might be able to do some fancy JavaScript to do so.
jQuery has the
scroll event built-in, but I'm pretty sure that wouldn't be useful here. A quick Google for
javascript scroll wheel yields some interesting results.