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diff --git a/js/src/tests/js1_3/inherit/proto_12.js b/js/src/tests/js1_3/inherit/proto_12.js
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+/* -*- 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:          proto_12.js
+   Section:
+   Description:        new PrototypeObject
+
+   This tests Object Hierarchy and Inheritance, as described in the document
+   Object Hierarchy and Inheritance in JavaScript, last modified on 12/18/97
+   15:19:34 on http://devedge.netscape.com/.  Current URL:
+   http://devedge.netscape.com/docs/manuals/communicator/jsobj/contents.htm
+
+   No Multiple Inheritance
+
+   Author:             christine@netscape.com
+   Date:               12 november 1997
+*/
+
+var SECTION = "proto_12";
+var VERSION = "JS1_3";
+var TITLE   = "No Multiple Inheritance";
+
+startTest();
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+function Employee ( name, dept ) {
+  this.name = name || "";
+  this.dept = dept || "general";
+  this.id = idCounter++;
+}
+function Manager () {
+  this.reports = [];
+}
+Manager.prototype = new Employee();
+
+function WorkerBee ( name, dept, projs ) {
+  this.base = Employee;
+  this.base( name, dept)
+    this.projects = projs || new Array();
+}
+WorkerBee.prototype = new Employee();
+
+function SalesPerson () {
+  this.dept = "sales";
+  this.quota = 100;
+}
+SalesPerson.prototype = new WorkerBee();
+
+function Hobbyist( hobby ) {
+  this.hobby = hobby || "yodeling";
+}
+
+function Engineer ( name, projs, machine, hobby ) {
+  this.base1 = WorkerBee;
+  this.base1( name, "engineering", projs )
+
+    this.base2 = Hobbyist;
+  this.base2( hobby );
+
+  this.projects = projs || new Array();
+  this.machine = machine || "";
+}
+Engineer.prototype = new WorkerBee();
+
+var idCounter = 1;
+
+var les = new Engineer( "Morris, Les",  new Array("JavaScript"), "indy" );
+
+Hobbyist.prototype.equipment = [ "horn", "mountain", "goat" ];
+
+new TestCase( SECTION,
+	      "les.name",
+	      "Morris, Les",
+	      les.name );
+
+new TestCase( SECTION,
+	      "les.dept",
+	      "engineering",
+	      les.dept );
+
+Array.prototype.getClass = Object.prototype.toString;
+
+new TestCase( SECTION,
+	      "les.projects.getClass()",
+	      "[object Array]",
+	      les.projects.getClass() );
+
+new TestCase( SECTION,
+	      "les.projects[0]",
+	      "JavaScript",
+	      les.projects[0] );
+
+new TestCase( SECTION,
+	      "les.machine",
+	      "indy",
+	      les.machine );
+
+new TestCase( SECTION,
+	      "les.hobby",
+	      "yodeling",
+	      les.hobby );
+
+new TestCase( SECTION,
+	      "les.equpment",
+	      void 0,
+	      les.equipment );
+
+test();