IE8中JSON未定义的解决
if (typeof JSON !== 'object') {JSON = {};(function() {'use strict';function f(n) {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 = {'\b': '\\b','\t': '\\t','\n': '\\n','\f': '\\f','\r': '\\r','"': '\\"','\\': '\\\\'}, rep;function quote(string) {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) {var i, k, v, length, mind = gap,partial, value = holder[key];if (value && typeof value === 'object' && typeof value.toJSON === 'function') {value = value.toJSON(key);}if (typeof rep === 'function') {value = rep.call(holder, key, value);}switch (typeof value) {case 'string':return quote(value);case 'number':return isFinite(value) ? String(value) : 'null';case 'boolean':case 'null':return String(value);case 'object':if (!value) {return 'null';}gap += indent;partial = [];if (Object.prototype.toString.apply(value) === '[object Array]') {length = value.length;for (i = 0; i < length; i += 1) {partial[i] = str(i, value) || 'null';}v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' : '[' + partial.join(',') + ']';gap = mind;return v;}if (rep && typeof rep === 'object') {length = rep.length;for (i = 0; i < length; i += 1) {if (typeof rep[i] === 'string') {k = rep[i];v = str(k, value);if (v) {partial.push(quote(k) + (gap ? ': ' : ':') + v);}}}} else {for (k in value) {if (Object.prototype.hasOwnProperty.call(value, k)) {v = str(k, value);if (v) {partial.push(quote(k) + (gap ? ': ' : ':') + v);}}}}v = partial.length === 0 ? '{}' : gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' : '{' + partial.join(',') + '}';gap = mind;return v;}}if (typeof JSON.stringify !== 'function') {JSON.stringify = function(value, replacer, space) {var i;gap = '';indent = '';if (typeof space === 'number') {for (i = 0; i < space; i += 1) {indent += ' ';}} else if (typeof space === 'string') {indent = space;}rep = replacer;if (replacer && typeof replacer !== 'function' && (typeof replacer !== 'object' || typeof replacer.length !== 'number')) {throw new Error('JSON.stringify');}return str('', {'': value});};}if (typeof JSON.parse !== 'function') {JSON.parse = function(text, reviver) {var j;function walk(holder, key) {var k, v, value = holder[key];if (value && typeof value === 'object') {for (k in value) {if (Object.prototype.hasOwnProperty.call(value, k)) {v = walk(value, k);if (v !== undefined) {value[k] = v;} else {delete value[k];}}}}return reviver.call(holder, key, value);}text = String(text);cx.lastIndex = 0;if (cx.test(text)) {text = text.replace(cx, function(a) {return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);});}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, ''))) {j = eval('(' + text + ')');return typeof reviver === 'function' ? walk({'': j}, '') : j;}throw new SyntaxError('JSON.parse');};}}());}
