onMouseOver give the full details

Hi,

When the event is one hour or when there are many events in the same time schedule, we cannot see the time, description, custom info (especially when the form in readonly). As Outlook has, I would like that just by hovering on the event, I can see all the necessary info.
Best is that a onmouseover event can be attach, so that we can open a clickable window that will contain also links to docs… (custom display). And a onmouseout to hide the window.

Is it possible to do it? (not by onclick, really onmouseover).

Regards,

Eric