Mouseover

In computing, a mouseover, mouse hover or hover box is a graphical control element that is activated when the user moves or "hovers" the pointer over its trigger area, usually with a mouse, but also possible using a digital pen. The graphical control element is particularly common in web browsers where the URL of a hyperlink can be viewed in the status bar. Site designers can easily define their own mouseover events using JavaScript and/or Cascading Style Sheets. In case of multiple layers the mouseover event is triggered by the uppermost layer.