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+++ b/dom/html/test/test_bug870787.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=870787
+-->
+<head>
+  <title>Test for Bug 870787</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript" src="reflect.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=870787">Mozilla Bug 870787</a>
+
+<p id="msg"></p>
+
+<form id="form0"></form>
+<img name="img0" id="img0id">
+
+<img name="img1" id="img1id" />
+<form id="form1">
+  <img name="img2" id="img2id" />
+</form>
+<img name="img3" id="img3id" />
+
+<table>
+  <form id="form2">
+  <tr><td>
+    <button name="input1" id="input1id" />
+    <input name="input2" id="input2id" />
+  </form>
+</table>
+
+<table>
+  <form id="form3">
+  <tr><td>
+    <img name="img4" id="img4id" />
+    <img name="img5" id="img5id" />
+  </form>
+</table>
+
+<form id="form4"><img id="img6"></form>
+
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 870787 **/
+
+var form0 = document.getElementById("form0");
+ok(form0, "Form0 exists");
+ok(!form0.img0, "Form0.img0 doesn't exist");
+ok(!form0.img0id, "Form0.img0id doesn't exist");
+
+var form1 = document.getElementById("form1");
+ok(form1, "Form1 exists");
+ok(!form1.img1, "Form1.img1 doesn't exist");
+ok(!form1.img1id, "Form1.img1id doesn't exist");
+is(form1.img2, document.getElementById("img2id"), "Form1.img2 exists");
+is(form1.img2id, document.getElementById("img2id"), "Form1.img2id exists");
+ok(!form1.img3, "Form1.img3 doesn't exist");
+ok(!form1.img3id, "Form1.img3id doesn't exist");
+
+var form2 = document.getElementById("form2");
+ok(form2, "Form2 exists");
+is(form2.input1, document.getElementById("input1id"), "Form2.input1 exists");
+is(form2.input1id, document.getElementById("input1id"), "Form2.input1id exists");
+is(form2.input2, document.getElementById("input2id"), "Form2.input2 exists");
+is(form2.input2id, document.getElementById("input2id"), "Form2.input2id exists");
+
+var form3 = document.getElementById("form3");
+ok(form3, "Form3 exists");
+is(form3.img4, document.getElementById("img4id"), "Form3.img4 doesn't exists");
+is(form3.img4id, document.getElementById("img4id"), "Form3.img4id doesn't exists");
+is(form3.img5, document.getElementById("img5id"), "Form3.img5 doesn't exists");
+is(form3.img5id, document.getElementById("img5id"), "Form3.img5id doesn't exists");
+
+var form4 = document.getElementById("form4");
+ok(form4, "Form4 exists");
+is(Object.getOwnPropertyNames(form4.elements).indexOf("img6"), -1, "Form4.elements should not contain img6");
+
+</script>
+</pre>
+</body>
+</html>