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diff --git a/dom/bindings/test/test_lookupGetter.html b/dom/bindings/test/test_lookupGetter.html
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+++ b/dom/bindings/test/test_lookupGetter.html
@@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=462428
+-->
+<head>
+  <title>Test for Bug 462428</title>
+  <script type="application/javascript" 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=462428">Mozilla Bug 462428</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 462428 **/
+var x = new XMLHttpRequest;
+x.open("GET", "");
+var getter = x.__lookupGetter__('readyState');
+ok(getter !== undefined, "But able to look it up the normal way");
+ok(!x.hasOwnProperty('readyState'), "property should still be on the prototype");
+
+var sawProp = false;
+for (var i in x) {
+    if (i === "readyState") {
+        sawProp = true;
+    }
+}
+
+ok(sawProp, "property should be enumerable");
+
+is(getter.call(x), 1, "the getter actually works");
+
+Object.getPrototypeOf(x).__defineSetter__('readyState', function() {});
+is(getter.call(x), 1, "the getter works after defineSetter");
+
+is(x.responseType, "", "Should have correct responseType up front");
+var setter = x.__lookupSetter__('responseType');
+setter.call(x, "document");
+is(x.responseType, "document", "the setter is bound correctly");
+
+</script>
+</pre>
+</body>
+</html>