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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=159849
+-->
+<head>
+ <title>Test for Bug 159849</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=159849">Mozilla Bug 159849</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 159849 **/
+function testFunc() {
+}
+
+var c = $("content");
+// Intentionally testing the 'with' statement.
+/* eslint-disable-next-line no-with */
+with (c) {
+ onmouseover = testFunc;
+ fooExpando = testFunc;
+}
+
+is(c.onmouseover, testFunc, "Event handler should have been set on node");
+ok(c.fooExpando === undefined,
+ "Expando should not have been set on node - " +
+ "got " + repr(c.fooExpando) + ", expected undefined");
+ok(window.onmouseover === null,
+ "Event handler should not have been set on window - " +
+ "got " + repr(window.onmouseover) + ", expected undefined");
+is(window.fooExpando, testFunc, "Expando should have been set on window");
+</script>
+</pre>
+</body>
+</html>
+