<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="utf-8"/>
<title>[lang="es-MX"], lang="es"</title>
<link rel='author' title='Richard Ishida' href='mailto:[email protected]'>
<link rel='help' href='http://www.w3.org/TR/css3-selectors/#attribute-selectors'>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style type='text/css'>
.test div { width: 50px; }
#box[lang='es-MX'] { width: 100px; }
</style>
</head>
<body>
<div class="test"><div id="box" lang="es"> </div></div>
<script>
test(function() {
assert_equals(document.getElementById('box').offsetWidth, 50);
}, "A lang= value will NOT match a lang attribute value when the former contains more subtags.");
</script>
<div id='log'></div>
</body>
</html>