css/selectors/css3-modsel-159.xml

<csstest def="Syntax and parsing of new pseudo-elements" module="W3C Selectors" modulename="css3-modsel" number="159" rev="1.0" date="20-november-2001" xmlns="http://www.example.org/css3tests">

<author>Ian Hickson</author>

<userinteraction/>

<cssrules>
  ::selection { background: lime; }
  :selection { background: red; }
</cssrules>

<code>
 <p xmlns="http://www.w3.org/1999/xhtml">Try selecting some text in this document. It should be have a green background.</p>
</code>

</csstest>