diff --git a/index.js b/index.js
index 5a47ca6..8859887 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 /*
     json2.js
-    2011-10-19
+    2014-02-04
 
     Public Domain.
 
@@ -159,7 +159,9 @@
 // Create a JSON object only if one does not already exist. We create the
 // methods in a closure to avoid creating global variables.
 
-var JSON = {};
+if (typeof JSON !== 'object') {
+    JSON = {};
+}
 
 (function () {
     'use strict';
@@ -171,7 +173,7 @@ var JSON = {};
 
     if (typeof Date.prototype.toJSON !== 'function') {
 
-        Date.prototype.toJSON = function (key) {
+        Date.prototype.toJSON = function () {
 
             return isFinite(this.valueOf())
                 ? this.getUTCFullYear()     + '-' +
@@ -185,24 +187,16 @@ var JSON = {};
 
         String.prototype.toJSON      =
             Number.prototype.toJSON  =
-            Boolean.prototype.toJSON = function (key) {
+            Boolean.prototype.toJSON = function () {
                 return this.valueOf();
             };
     }
 
-    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
-        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+    var cx,
+        escapable,
         gap,
         indent,
-        meta = {    // table of character substitutions
-            '\b': '\\b',
-            '\t': '\\t',
-            '\n': '\\n',
-            '\f': '\\f',
-            '\r': '\\r',
-            '"' : '\\"',
-            '\\': '\\\\'
-        },
+        meta,
         rep;
 
 
@@ -354,6 +348,16 @@ var JSON = {};
 // If the JSON object does not yet have a stringify method, give it one.
 
     if (typeof JSON.stringify !== 'function') {
+        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+        meta = {    // table of character substitutions
+            '\b': '\\b',
+            '\t': '\\t',
+            '\n': '\\n',
+            '\f': '\\f',
+            '\r': '\\r',
+            '"' : '\\"',
+            '\\': '\\\\'
+        };
         JSON.stringify = function (value, replacer, space) {
 
 // The stringify method takes a value and an optional replacer, and an optional
@@ -401,6 +405,7 @@ var JSON = {};
 // If the JSON object does not yet have a parse method, give it one.
 
     if (typeof JSON.parse !== 'function') {
+        cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
         JSON.parse = function (text, reviver) {
 
 // The parse method takes a text and an optional reviver function, and returns