Mouse Rollover Effects
Rollover effects change the appearance of a button when the mouse cursor rolls over it.
The simplest effect is a link's font color changing when it is rolled over by the mouse cursor. Other objects' backgrounds and borders can also be set to have their colors change upon mouse rollover.
For graphical elements like images or buttons, it's also possible to set the border, text, or fill color to change when rolled over with the mouse cursor.