Conditional selector depends on child nodes ul(a:hover) {property:value;} Code means select ul element that contains a element with hover statement. Example <style type="text/css"> ul { background-color: #999; } ul a:link { color: blue; } ul a:hover { color: red; } </style> <ul> <li><a href="/products">products</a> <li><a href="/store">store</a> <li><a href="/products">blog</a> <li><a href="/support">support</a> <li><a href="/community">community</a> </ul> This code [...]