2.1.121 [CSS-Level2-2009] Section 18.4.1, Outlines and the focus

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V0296:

The specification states:

 User agents supporting the interactive media group must keep track of where the 
 focus lies and must also represent the focus. This may be done by using dynamic 
 outlines in conjunction with the :focus pseudo-class.

Quirks Mode and IE7 Mode (All Versions)

The outline property is not supported.