Labelling Buttons

Hi,

I'm relatively new to the MashZone so i'm still not sure about what it can do.
I'm inserting images as buttons to my tabs, like: Home, Search etc, and i want to label them.
I don't want to put a permanent label (by adding a text box), i want the label to "pop up" when i go over the icon with the mouse.

Can it be done? and how?