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diff --git a/js/src/tests/ecma_3/Object/shell.js b/js/src/tests/ecma_3/Object/shell.js
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+++ b/js/src/tests/ecma_3/Object/shell.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/*
+ * Date: 14 Mar 2001
+ *
+ * SUMMARY: Utility functions for testing objects -
+ *
+ * Suppose obj is an instance of a native type, e.g. Number.
+ * Then obj.toString() invokes Number.prototype.toString().
+ * We would also like to access Object.prototype.toString().
+ *
+ * The difference is this: suppose obj = new Number(7).
+ * Invoking Number.prototype.toString() on this just returns 7.
+ * Object.prototype.toString() on this returns '[object Number]'.
+ *
+ * The getJSType() function below will return '[object Number]' for us.
+ * The getJSClass() function returns 'Number', the [[Class]] property of obj.
+ * See ECMA-262 Edition 3,  13-Oct-1999,  Section 8.6.2 
+ */
+//-----------------------------------------------------------------------------
+
+
+var cnNoObject = 'Unexpected Error!!! Parameter to this function must be an object';
+var cnNoClass = 'Unexpected Error!!! Cannot find Class property';
+var cnObjectToString = Object.prototype.toString;
+var GLOBAL = 'global';
+
+// checks that it's safe to call findType()
+function getJSType(obj)
+{
+  if (isObject(obj))
+    return findType(obj);
+  return cnNoObject;
+}
+
+
+// checks that it's safe to call findType()
+function getJSClass(obj)
+{
+  if (isObject(obj))
+    return findClass(findType(obj));
+  return cnNoObject;
+}
+
+
+function findType(obj)
+{
+  return cnObjectToString.apply(obj);
+}
+
+
+// given '[object Number]',  return 'Number'
+function findClass(sType)
+{
+  var re =  /^\[.*\s+(\w+)\s*\]$/;
+  var a = sType.match(re);
+ 
+  if (a && a[1])
+    return a[1];
+  return cnNoClass;
+}
+
+
+function isObject(obj)
+{
+  return obj instanceof Object;
+}
+