There is no need to use Flash for something so basic. I can't answer your Dreamweaver questions, sorry. As a Web Developer, I code HTML, CSS and JavaScript "by hand". If you'll be working in this arena, those are skills you should definitely learn!

A very simple script using JavaScript's "onmouseover" and "onmouseout" events will do what you're asking. I'd suggest doing some web searches on those terms, and then post again if you have any more questions.

Also, on a personal note, since this is a professional forum, I would ask that everyone use proper spelling, punctuation, and grammar. It doesn't take that much more time and increases your chances of getting quality responses.