JS对象序列化为JSON对象

    /** 
     * JSON 解析类 
     * Copyright (c) 2010 YaoYiLang  
     * @email  [e-mail] 
     * @datetime 2008-04-18 
     * @version 1.0 
     *  
     * 方法： 
     * 将JSON字符串解码为页面可识别的object对象 
     * @param {String} json The JSON string 
     * @return {Object} The resulting object  
     * Object o = JSONUtil.decode(json); 
     *  
     * 将JS对象序列化为JSON字符串 
     * @param {Mixed} o The variable to decode 
     * @return {String} The JSON string 
     * String json = JSONUtil.encode(o); 
     */  
      
    var JSONUtil;  
    if (!JSONUtil) {  
        JSONUtil = {};  
    }  
    JSONUtil.decode = function(json) {  
        try {  
            return eval("\u0028" + json + '\u0029');  
        } catch (exception) {  
            return eval("\u0075\u006e\u0064\u0065\u0066\u0069\u006e\u0065\u0064");  
        }  
    };  
    JSONUtil.encode = (function() {  
        var $ = !!{}.hasOwnProperty, _ = function($) {  
            return $ < 10 ? "0" + $ : $  
        }, A = {  
            "\b" : "\\b",  
            "\t" : "\\t",  
            "\n" : "\\n",  
            "\f" : "\\f",  
            "\r" : "\\r",  
            "\"" : "\\\"",  
            "\\" : "\\\\"  
        };  
        return (function(C) {  
            if (typeof C == "\u0075\u006e\u0064\u0065\u0066\u0069\u006e\u0065\u0064" || C === null)  
                return "null";  
            else if (Object.prototype.toString.call(C) === "\u005b\u006f\u0062\u006a\u0065\u0063\u0074\u0020\u0041\u0072\u0072\u0061\u0079\u005d") {  
                var B = ["\u005b"], G, E, D = C.length, F;  
                for (E = 0; E < D; E += 1) {  
                    F = C[E];  
                    switch (typeof F) {  
                        case "\u0075\u006e\u0064\u0065\u0066\u0069\u006e\u0065\u0064" :  
                        case "\u0066\u0075\u006e\u0063\u0074\u0069\u006f\u006e" :  
                        case "\u0075\u006e\u006b\u006e\u006f\u0077\u006e" :  
                            break;  
                        default :  
                            if (G)  
                                B.push("\u002c");  
                            B.push(F === null ? "null" : this.encode(F));  
                            G = true  
                    }  
                }  
                B.push("\u005d");  
                return B.join("")  
            } else if ((Object.prototype.toString.call(C) === "\u005b\u006f\u0062\u006a\u0065\u0063\u0074\u0020\u0044\u0061\u0074\u0065\u005d"))  
                return "\"" + C.getFullYear() + "-" + _(C.getMonth() + 1) + "-" + _(C.getDate()) + "T" + _(C.getHours()) + ":" + _(C.getMinutes()) + ":" + _(C.getSeconds()) + "\"";  
            else if (typeof C == "\u0073\u0074\u0072\u0069\u006e\u0067") {  
                if (/["\\\x00-\x1f]/.test(C))  
                    return "\"" + C.replace(/([\x00-\x1f\\"])/g, function(B, _) {  
                        var $ = A[_];  
                        if ($)  
                            return $;  
                        $ = _.charCodeAt();  
                        return "\\u00" + Math.floor($ / 16).toString(16) + ($ % 16).toString(16)  
                    }) + "\"";  
                return "\"" + C + "\""  
            } else if (typeof C == "\u006e\u0075\u006d\u0062\u0065\u0072")  
                return isFinite(C) ? String(C) : "null";  
            else if (typeof C == "\u0062\u006f\u006f\u006c\u0065\u0061\u006e")  
                return String(C);  
            else {  
                B = ["\u007b"], G, E, F;  
                for (E in C)  
                    if (!$ || C.hasOwnProperty(E)) {  
                        F = C[E];  
                        if (F === null)  
                            continue;  
                        switch (typeof F) {  
                            case "\u0075\u006e\u0064\u0065\u0066\u0069\u006e\u0065\u0064" :  
                            case "\u0066\u0075\u006e\u0063\u0074\u0069\u006f\u006e" :  
                            case "\u0075\u006e\u006b\u006e\u006f\u0077\u006e" :  
                                break;  
                            default :  
                                if (G)  
                                    B.push("\u002c");  
                                B.push(this.encode(E), "\u003a", this.encode(F));  
                                G = true  
                        }  
                    }  
                B.push("\u007d");  
                return B.join("")  
            }  
        })  
    })();  
    window.JSONUtil = JSONUtil;  

【转载】http://relucent.iteye.com/blog/646016