while you can do it with the new cf8 ajax features, it is
really a
javascript issue.
you may want to google "javascript mouseover change div
content" or
something similar to get sample code, which is abundant.
you may also want to look at jQuery or similar js libraries,
which make
it trivial to achieve practically any UI effect you can dream
of...
if you are after displaying some additional content on a
link/image/button mouseover, jQuery have very nice tooltip
plug-ins...
hth
Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com/