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diff --git a/js/src/tests/ecma/ObjectObjects/15.2.4.3.js b/js/src/tests/ecma/ObjectObjects/15.2.4.3.js
new file mode 100644
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+++ b/js/src/tests/ecma/ObjectObjects/15.2.4.3.js
@@ -0,0 +1,83 @@
+/* -*- tab-width: 2; 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/. */
+
+
+/**
+   File Name:          15.2.4.3.js
+   ECMA Section:       15.2.4.3 Object.prototype.valueOf()
+
+   Description:        As a rule, the valueOf method for an object simply
+   returns the object; but if the object is a "wrapper"
+   for a host object, as may perhaps be created by the
+   Object constructor, then the contained host object
+   should be returned.
+
+   This only covers native objects.
+
+   Author:             christine@netscape.com
+   Date:               28 october 1997
+
+*/
+var SECTION = "15.2.4.3";
+var VERSION = "ECMA_1";
+startTest();
+var TITLE   = "Object.prototype.valueOf()";
+
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+
+var myarray = new Array();
+myarray.valueOf = Object.prototype.valueOf;
+var myboolean = new Boolean();
+myboolean.valueOf = Object.prototype.valueOf;
+var myfunction = new Function();
+myfunction.valueOf = Object.prototype.valueOf;
+var myobject = new Object();
+myobject.valueOf = Object.prototype.valueOf;
+var mymath = Math;
+mymath.valueOf = Object.prototype.valueOf;
+var mydate = new Date();
+mydate.valueOf = Object.prototype.valueOf;
+var mynumber = new Number();
+mynumber.valueOf = Object.prototype.valueOf;
+var mystring = new String();
+mystring.valueOf = Object.prototype.valueOf;
+
+new TestCase( SECTION,  "Object.prototype.valueOf.length",      0,      Object.prototype.valueOf.length );
+
+new TestCase( SECTION,
+	      "myarray = new Array(); myarray.valueOf = Object.prototype.valueOf; myarray.valueOf()",
+	      myarray,
+	      myarray.valueOf() );
+new TestCase( SECTION,
+	      "myboolean = new Boolean(); myboolean.valueOf = Object.prototype.valueOf; myboolean.valueOf()",
+	      myboolean,
+	      myboolean.valueOf() );
+new TestCase( SECTION,
+	      "myfunction = new Function(); myfunction.valueOf = Object.prototype.valueOf; myfunction.valueOf()",
+	      myfunction,
+	      myfunction.valueOf() );
+new TestCase( SECTION,
+	      "myobject = new Object(); myobject.valueOf = Object.prototype.valueOf; myobject.valueOf()",
+	      myobject,
+	      myobject.valueOf() );
+new TestCase( SECTION,
+	      "mymath = Math; mymath.valueOf = Object.prototype.valueOf; mymath.valueOf()",
+	      mymath,
+	      mymath.valueOf() );
+new TestCase( SECTION,
+	      "mynumber = new Number(); mynumber.valueOf = Object.prototype.valueOf; mynumber.valueOf()",
+	      mynumber,
+	      mynumber.valueOf() );
+new TestCase( SECTION,
+	      "mystring = new String(); mystring.valueOf = Object.prototype.valueOf; mystring.valueOf()",
+	      mystring,
+	      mystring.valueOf() );
+new TestCase( SECTION,
+	      "mydate = new Date(); mydate.valueOf = Object.prototype.valueOf; mydate.valueOf()",
+	      mydate,
+	      mydate.valueOf() );
+
+test();