Thread:Project:Support desk/Request documentation for mouseover / hover effect

I was wondering if anyone could write a step-by-step plan for something like the following:

http://bavotasan.com/2009/a-simple-mouseover-hover-effect-with-jquery/

A fairly ubiquitous device, so it would surprise me if this wasn't possible in MW. So should any file be modified? Any MW page? How should this be activated in File:...? And so on.