Adding rollovers to TextArea component

Hello there.

Any help or guidance to the following problem would be greatly appreciated.
In an application I am building I have a TextArea component which will render dynamic HTML. I would like to capture rollovers on certain words to bring up a clip with text. Can this be done with an invisible button / mc created dynamically inside the TextArea component (embedded with the <img> tag) ?

Kind Regards,
Ron