(1) To move the mouse pointer over an object on screen such as an icon, text link or menu.

(2) (mouseover) A JavaScript instruction that tests the current position of the mouse. It is used to change the appearance of a button used as a hyperlink to another page. Two buttons are created: one in the normal state; the other altered to look like it was pressed in some manner. The JavaScript statement "on mouseover" displays the altered image.

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