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+<!DOCTYPE html>
+<head>
+  <meta charset="utf-8">
+  <title>HTML Test: the browsing contexts created by various container elements</title>
+  <link rel="author" title="Intel" href="http://www.intel.com/" />
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script>
+
+  var t1 = async_test("Accessing child browsing contexts 1");
+  var t2 = async_test("Accessing child browsing contexts 2");
+  var t3 = async_test("Accessing child browsing contexts 3");
+  function on_load() {
+    //Child browsing contexts created by iframe, object and embed elements.
+    t1.step(function () {
+      assert_equals(window.length, 3, "The top browsing context should have 3 child browsing contexts.");
+    });
+    t1.step(function () {
+      assert_equals(window[0].name, "win1", "The browsing context name should be 'win1'.");
+      assert_equals(window[1].name, "win2", "The browsing context name should be 'win2'.");
+      assert_equals(window[2].name, "win3", "The browsing context name should be 'win3'.");
+    });
+    t1.done();
+
+    //Child browsing contexts created by frame elements.
+    t2.step(function () {
+      assert_equals(document.getElementById("fr").contentWindow.length, 2,
+                    "The child browsing context created by the iframe element should have 2 child browsing contexts.");
+    });
+    t2.step(function () {
+      assert_equals(document.getElementById("fr").contentWindow[0].name, "win4",
+                    "The browsing context name should be 'win4'.");
+      assert_equals(document.getElementById("fr").contentWindow[1].name, "win5",
+                    "The browsing context name should be 'win5'.");
+    });
+    t2.done();
+
+    //The child browsing context will be removed if the data attribute of the associated object element is removed.
+    t3.step(function () {
+      document.getElementById("obj").removeAttribute("type");
+      assert_equals(window.length, 3, "The top browsing context should have 3 child browsing contexts.");
+      document.getElementById("obj").removeAttribute("data");
+      assert_equals(window.length, 3, "The top browsing context should have 3 child browsing contexts.");
+
+      setTimeout(function () {
+        assert_equals(window.length, 2, "The top browsing context should have 2 child browsing contexts.");
+      }, 1);
+    });
+    t3.done();
+  }
+
+  </script>
+</head>
+<body onload="on_load()">
+  <div id="log"></div>
+  <div style="display:none">
+    <iframe id="fr" name="win1" src="test3.html"></iframe>
+    <object id="obj" name="win2" type="text/html" data="about:blank"></object>
+    <object type="image/png" src="/images/green.png"></object>
+    <embed id="emb" name="win3" type="image/svg+xml" src="/images/green.svg"></embed>
+  </div>
+</body>