<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html> <head> <title>Default attribute value and negation pseudo-class</title> <style type="text/css">form { background-color : red } form:not([method]) { background-color : lime } </style> <link rel="first" href="css3-modsel-1.html" title="Groups of selectors"> <link rel="prev" href="css3-modsel-56.html" title="NEGATED substring matching attribute selector on middle"> <link rel="next" href="css3-modsel-59.html" title="NEGATED class selector"> <link rel="last" href="css3-modsel-d5e.html" title="NEGATED :indeterminate with :checked"> <link rel="up" href="./index.html"> <link rel="top" href="../../index.html"> </head> <body> <!-- 'method' is an attribute with a default value in the XHTML DTD --> <form action="http://www.example.org/foo.cgi"> <p>The paragraph should have a green background.</p> </form> </body> </html>