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Rollover is triggered when the mouse moves over the primary image, causing the secondary image to appear. The primary image reappears when the mouse is moved away.
Occasionally, rollover is referred to as synonym for mouseover.
Rollover can be accomplished using text, buttons or images, which can be made to appear when the mouse is rolled over an image. The user needs two images/buttons to perform rollover action.
An imagery rollover can be done with the help of a program with a scripting code or a tool that supports the rollover technique.
Some of the key features of rollover include: