/* 3n of paragraph with the class foobar but for which foobar is not the only class. */
p:nth-child(3n+1 of p.foobar:not([class=foobar])) {
background-color: lime;
}
</style>
</head>
<body>
<pclass="foobar foo"></p>
<p>This test the styling of paragraphs with :nth-child(An+B of selector). If the test succeed, paragraphs that say "green" should have a green background.</p>