What Does Rollover Mean?
Rollover is a JavaScript technique used by Web developers to produce an effect in which the appearance of a graphical image changes when the user rolls the mouse pointer over it. Rollover also refers to a button on a Web page that allows interactivity between the user and the Web page. It causes the button to react by either replacing the source image at the button with another image or redirecting it to a different Web page.
Techopedia Explains Rollover
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.
