diff --git a/js/tests/ecma_3/RegExp/regress-100199.js b/js/tests/ecma_3/RegExp/regress-100199.js
new file mode 100644
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+++ b/js/tests/ecma_3/RegExp/regress-100199.js
@@ -0,0 +1,179 @@
+/*
+* The contents of this file are subject to the Netscape Public
+* License Version 1.1 (the "License"); you may not use this file
+* except in compliance with the License. You may obtain a copy of
+* the License at http://www.mozilla.org/NPL/
+*
+* Software distributed under the License is distributed on an "AS  IS"
+* basis, WITHOUT WARRANTY OF ANY KIND, either expressed
+* or implied. See the License for the specific language governing
+* rights and limitations under the License.
+*
+* The Original Code is mozilla.org code.
+*
+* The Initial Developer of the Original Code is Netscape
+* Communications Corporation.  Portions created by Netscape are
+* Copyright (C) 1998 Netscape Communications Corporation.
+* All Rights Reserved.
+*
+* Contributor(s): pschwartau@netscape.com
+* Date: 17 September 2001
+*
+* SUMMARY: Regression test for Bugzilla bug 100199
+* See http://bugzilla.mozilla.org/show_bug.cgi?id=100199
+*
+* The empty character class [] is a valid RegExp construct: the condition
+* that a given character belong to a set containing no characters. As such,
+* it can never be met and is always FALSE. Similarly, [^] is a condition
+* that matches any given character and is always TRUE.
+*
+* Neither one of these conditions should cause syntax errors in a RegExp.
+*/
+//-----------------------------------------------------------------------------
+var i = 0;
+var bug = 100199;
+var summary = '[], [^] are valid RegExp conditions. Should not cause errors -';
+var status = '';
+var statusmessages = new Array();
+var pattern = '';
+var patterns = new Array();
+var string = '';
+var strings = new Array();
+var actualmatch = '';
+var actualmatches = new Array();
+var expectedmatch = '';
+var expectedmatches = new Array();
+
+/*******************************************************
+pattern = /[]/;
+  string = 'abc';
+  status = inSection(1);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = '';
+  status = inSection(2);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = '[';
+  status = inSection(3);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = '/';
+  status = inSection(4);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+
+pattern = /a[]/;
+  string = 'abc';
+  status = inSection(5);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = '';
+  status = inSection(6);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = 'a[';
+  status = inSection(7);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+  string = 'a[]';
+  status = inSection(8);
+  actualmatch = string.match(pattern);
+  expectedmatch = null;
+  addThis();
+
+*******************************************************/
+
+
+pattern = /[^]/;
+  string = 'abc';
+  status = inSection(9);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('a');
+  addThis();
+
+  string = '';
+  status = inSection(10);
+  actualmatch = string.match(pattern);
+  expectedmatch = null; //there are no characters to test against the condition
+  addThis();
+
+  string = '\[';
+  status = inSection(11);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('[');
+  addThis();
+
+  string = '\/';
+  status = inSection(12);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('/');
+  addThis();
+
+
+pattern = /a[^]/;
+  string = 'abc';
+  status = inSection(13);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('ab');
+  addThis();
+
+  string = '';
+  status = inSection(14);
+  actualmatch = string.match(pattern);
+  expectedmatch = null; //there are no characters to test against the condition
+  addThis();
+
+  string = 'a[';
+  status = inSection(15);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('a[');
+  addThis();
+
+  string = 'a[]';
+  status = inSection(16);
+  actualmatch = string.match(pattern);
+  expectedmatch = Array('a[');
+  addThis();
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusmessages[i] = status;
+  patterns[i] = pattern;
+  strings[i] = string;
+  actualmatches[i] = actualmatch;
+  expectedmatches[i] = expectedmatch;
+  i++;
+}
+
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber (bug);
+  printStatus (summary);
+  testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
+  exitFunc ('test');
+}