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 == null) type = 'object';
        else 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;
                break;
            case 'function':
            case 'boolean':
            case 'regexp':
                return object.toString();
                break;
            case 'number':
                return isFinite(object) ? object.toString() : 'null';
                break;
            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' : ""
        }) + '"';
                break;
            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(',') + '}';
                break;
            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(',') + ']';
                break;
        }
    }
});