javascript扩展，将对象扩转换成json字符串

JavaScript代码

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jQuery.extend({          /**     * @see 将javascript数据类型转换为json字符串       * @param 待转换对象,支持  object,array,string,function,number,boolean,regexp       * @return 返回json字符串     */          toJSON:function(object){                var type = typeof object;                if ('object' == type) {                      if (Array == object.constructor)                 type = 'array';                      else if (RegExp == object.constructor)                   type = 'regexp';                      else                 type = 'object';                }                switch (type) {                    case 'undefined':                    case 'unknown':                          return;                       case 'function':                    case 'boolean':                    case 'regexp':                          return object.toString();                      case 'number':                          return isFinite(object) ?   object.toString() : 'null';                      case 'string':                          return '"' + object.replace(/(|")/g, "$1").replace(/n|r|t/g, function(){                                        var a = arguments[0];                                       return (a == 'n') ? 'n': (a == 'r') ? 'r': (a == 't') ? 't': ""                                  }) + '"';                      case 'object':                          if (object === null)                     return 'null';                          var results = [];                  for (var property in object) {                                var value = jQuery.toJSON(object[property]);                                if (value !== undefined) results.push(jQuery.toJSON(property) + ':' + value);                          }                          return '{' + results.join(',') + '}';                      case 'array':                          var results = [];                          for (var i = 0; i < object.length; i++) {                                var value = jQuery.toJSON(object[i]);                                if (value !== undefined) results.push(value);                         }                          return '[' + results.join(',') + ']';                 }          }    });