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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=667520
+-->
+<head>
+ <title>Test for Bug 667520</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=667520">Mozilla Bug 667520</a>
+<p id="display">
+ <!-- important: we need a <span> as the second element child and then
+ non-span elements between that and the next </span> -->
+ <i></i>
+ <span id="2"></span>
+ <i></i>
+ <i></i>
+ <i></i>
+ <i></i>
+ <span id="7"></span>
+ <span id="8"></span>
+</p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 667520 **/
+var spans = $("display").querySelectorAll("span");
+is(spans.length, 3, "Should have 3 span kids");
+
+is($("display").querySelector("span:nth-child(3)"), null, "Third child is not span");
+is($("display").querySelector("span:nth-child(4)"), null, "Fourth child is not span");
+
+for (var i = 0; i < spans.length; ++i) {
+ var id = spans[i].id;
+ /* Important: need to include 'span' in that selector so we only match
+ nth-child against spans. */
+ var target = $("display").querySelector("span:nth-child("+id+")");
+ is(target, spans[i], "Unexpected element");
+ is(target.id, spans[i].id, "Unexpected id");
+}
+
+</script>
+</pre>
+</body>
+</html>