// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables. 
if (!this.JSON) { 
this.JSON = {}; } (function () { function f(n) { // Format integers to have at least two digits. 
return n < 10 ? '0' + n : n; } if (typeof 
Date.prototype.toJSON !== 'function') { Date.prototype.toJSON = function (key) { 
return isFinite(this.valueOf()) ? this.getUTCFullYear()   + '-' + 
f(this.getUTCMonth() + 1) + '-' + f(this.getUTCDate())      + 'T' + 
f(this.getUTCHours())     + ':' + f(this.getUTCMinutes())   + ':' + 
f(this.getUTCSeconds())   + 'Z' : null; }; String.prototype.toJSON = 
Number.prototype.toJSON = Boolean.prototype.toJSON = function (key) { 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, gap, indent, 
 meta = {    // table of character substitutions
 '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': 
'\\f', '\r': '\\r', '"' : '\\"', '\\': '\\\\' }, rep; function quote(string) { 
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it. 
// Otherwise we must also replace the offending characters with safe escape 
// sequences. 
escapable.lastIndex = 0; return escapable.test(string) ? '"' + 
string.replace(escapable, function (a) { var c = meta[a]; return typeof c === 
'string' ? c : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4); }) + 
'"' : '"' + string + '"'; } function str(key, holder) { // Produce a string from holder[key]. 
var i, // The loop counter. 
k,  
// The member key. 
v,
// The member value. 
length, mind = gap, partial, value = holder[key]; 
// If the value has a toJSON method, call it to obtain a replacement value. 
if (value && typeof value === 'object' && typeof value.toJSON === 'function') { value = 
value.toJSON(key); } // If we were called with a replacer function, then call the replacer to 
// obtain a replacement value. 
if (typeof rep === 'function') { 
value = rep.call(holder, key, value); } // What happens next depends on the value's type. 
switch (typeof value) { case 'string': return quote(value); case 
'number': // JSON numbers must be finite. Encode non-finite numbers as null. 
return isFinite(value) ? String(value) : 'null'; case 'boolean': case 'null': // If the value is a boolean or null, convert it to a string. Note: 
// typeof null does not produce 'null'. The case is included here in 
// the remote chance that this gets fixed someday. 
return String(value); // If the type is 'object', we might be dealing with an object or an array or 
// null. 
case 'object': 
// Due to a specification blunder in ECMAScript, typeof null is 'object', 
// so watch out for that case. 
if (!value) { return 'null'; } // Make an array to hold the partial results of stringifying this object value. 
gap += indent; partial = []; 
// Is the value an array? 
if (Object.prototype.toString.apply(value) === 
'[object Array]') { // The value is an array. Stringify every element. Use null as a placeholder 
// for non-JSON values. 
length = value.length; for (i = 0; i < 
length; i += 1) { partial[i] = str(i, value) || 'null'; } // Join all of the elements together, separated with commas, and wrap them in 
// brackets.
v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + 
'\n' + mind + ']' : '[' + partial.join(',') + ']'; gap = mind; return v; } // If the replacer is an array, use it to select the members to be stringified. 
if (rep && typeof rep === 'object') { length = rep.length; for (i = 0; i < length; 
i += 1) { k = rep[i]; if (typeof k === 'string') { v = str(k, value); if (v) { 
partial.push(quote(k) + (gap ? ': ' : ':') + v); } } } } else { // Otherwise,iterate through all of the keys in the object. 
for (k in value) { if (Object.hasOwnProperty.call(value, k)) { v = str(k, value); 
if (v) { partial.push(quote(k) + (gap ? ': ' : ':') + v); } } } } // Join all of the member texts together, separated with commas, 
// and wrap them in braces. 
v = partial.length === 0 ? '{}' : gap ? '{\n' + gap + partial.join(',\n' + gap) + 
'\n' + mind + '}' : '{' + partial.join(',') + '}'; gap = mind; return v; } } 
// If the JSON object does not yet have a stringify method, give it one. 
if (typeof JSON.stringify !== 'function') { JSON.stringify = function (value, replacer, 
space) { // The stringify method takes a value and an optional replacer, and an optional 
// space parameter, and returns a JSON text. The replacer can be a function 
// that can replace values, or an array of strings that will select the keys. 
// A default replacer method can be provided. Use of the space parameter can 
// produce text that is more easily readable. var i; gap = ''; indent = ''; 
// If the space parameter is a number, make an indent string containing that 
// many spaces. 
if (typeof space === 'number') { for (i = 0; i < space; i += 1) { 
indent += ' '; } // If the space parameter is a string, it will be used as the indent string.
 } else if (typeof space === 'string') { indent = space; } // If there is a replacer, it must be a function or an array. 
// Otherwise, throw an error. 
rep = replacer; if (replacer && typeof replacer !== 'function' && (typeof 
replacer !== 'object' || typeof replacer.length !== 'number')) { throw new 
Error('JSON.stringify'); } // Make a fake root object containing our value under the key of ''. 
// Return the result of stringifying the value. 
return str('', {'': value}); }; } // If the JSON object does not yet have a parse method, give it one. 
if (typeof JSON.parse !== 'function') { JSON.parse = function (text, 
reviver) { // The parse method takes a text and an optional reviver function, and returns 
// a JavaScript value if the text is a valid JSON text. 
var j; 
function walk(holder, key) { // The walk method is used to recursively walk the resulting structure so 
// that modifications can be made. 
var k, v, value = holder[key]; if (value && typeof value === 'object') { for (k in value) { if 
(Object.hasOwnProperty.call(value, k)) { v = walk(value, k); if (v !== 
undefined) { value[k] = v; } else { delete value[k]; } } } } return 
reviver.call(holder, key, value); } // Parsing happens in four stages. In the first stage, we replace certain 
// Unicode characters with escape sequences.JavaScript handles many characters 
// incorrectly, either silently deleting them, or treating them as line endings. 
cx.lastIndex = 0; if (cx.test(text)) { 
text = text.replace(cx, function (a) { return '\\u' + ('0000' + 
a.charCodeAt(0).toString(16)).slice(-4); }); } // In the second stage, we run the text against regular expressions that look
 // for non-JSON patterns. We are especially concerned with '()' and 'new' 
 // because they can cause invocation, and '=' because it can cause mutation.
 // But just to be safe, we want to reject all unexpected forms. 
 // We split the second stage into 4 regexp operations in order to work around 
 // crippling inefficiencies in IE's and Safari's regexp engines. First we 
 // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we 
 // replace all simple value tokens with ']' characters. Third, we delete all 
 // open brackets that follow a colon or comma or that begin the text. Finally,
 // we look to see that the remaining characters are only whitespace or ']' or 
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval. 
if (/^[\],:{}\s]*$/. 
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@'). 
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\ d+)?/g, 
']'). replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { // In the third stage we use the eval function to compile the text into a 
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity 
// in JavaScript: it can begin a block or an object literal. We wrap the text 
// in parens to eliminate the ambiguity. 
j = eval('(' + text + ')'); // In the optional fourth stage, we recursively walk the new structure, passing 
// each name/value pair to a reviver function for possible transformation. 
return typeof reviver === 'function' ? 
walk({'': j}, '') : j; } // If the text is not JSON parseable, then a SyntaxError is thrown. 
throw new SyntaxError('JSON.parse'); }; } }());