mouse hover, links and pictures

Hello Everybody,

I am settiing up a webpage and I have one problem.

There is a bullet list with a few options; each item of the list is also a link to another page that explain the details of the topic.
I would like to associate each link to an image so that everytime the mouse hovers on one of those links the images associate shows up.

Is there a plugin for that ? I am a very newbe and not sure I can produce some code for that.

Many thanks

Pio Pio