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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Unique Identifier</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#attributes-common-to-html-and-mathml-elements">
+<link rel="help" href="https://w3c.github.io/mathml-core/#dom-and-javascript">
+<meta name="assert" content="Verify whether the getElementById() works for MathML elements.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+ setup({ explicit_done: true });
+ window.addEventListener("DOMContentLoaded", function() {
+ var mtext = document.getElementById("MTEXT");
+ test(function() {
+ assert_equals(mtext, document.body.lastElementChild.lastElementChild);
+ }, "getElementById()");
+ done();
+ });
+</script>
+</head>
+<body>
+ <div id="log"></div>
+ <math>
+ <mtext id="MTEXT_"></mtext>
+ <mtext id="MTEX"></mtext>
+ <mtext id="MTEXT"></mtext>
+ </math>
+</body>
+</html>