I'm trying to compose a "What do the remote buttons do" page for the FAQ at riocar.org.

Ideally, I'd like to have GIF pictures of the Rio and Kenwood remotes up on the screen, then when the mouse moves over a button, have a small window pop up describing the function of that button. This window could be either over the button, or it could be text below the image.

I would want the text to be easily modifiable. In other words, putting up a GIF of the text is not desired.

I assume Javascript would be the easiest way to do this. does anyone have any example code for this?

Note: Things I'd like to avoid: Slicing up the image (I'd rather enter X/Y numbers into code than slice the image), using the browser's status bar text (I know how to do that, it's cheesy), and putting up message boxes that require an OK confirmation (I could do that too, but it would be irritating to use).