diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-328897.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-328897.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 328897;
+var summary = 'JS_ReportPendingException should';
+
+var actual = 'No Error';
+var expect = 'No Error';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+ 
+if (typeof window == 'undefined')
+{
+  reportCompare(expect, actual, summary);
+}
+else
+{
+  expect = /TypeError: Not enough arguments to Window.showModalDialog./;
+
+  window._onerror = window.onerror;
+  window.onerror = (function (msg, page, line) { 
+      actual = msg; 
+      gDelayTestDriverEnd = false;
+      jsTestDriverEnd();
+      reportMatch(expect, actual, summary);
+    });
+
+  gDelayTestDriverEnd = true;
+
+  // Trying to set call window.showModalDialog() without any arguments will throw.
+  window.showModalDialog();
+  actual = 'No Error';
+}
+
+function onload() 
+{
+  if (actual == 'No Error')
+  {
+    gDelayTestDriverEnd = false;
+    jsTestDriverEnd();
+    reportCompare(expect, actual, summary);
+  }
+}