Hyperlink pseudo-class
•a: link {style for never visited links}
•a: visited {style for visited links}
•a: active {style for link that is currently being clicked}
•a: hover {style when the mouse cursor is hovering over the link} – rollover effect.
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•examples/css/link_rollover.html
  a:hover {color=red; text-transform:uppercase;
                        font-weight=bold}