var JsonUti = {
            //定義換行符            n: "\n",
            //定義製表符            t: "\t",
            //轉換String            convertToString: function(obj) {
                return JsonUti.__writeObj(obj, 1);
            },
            //寫物件            __writeObj: function(obj    //物件                    , level             //層次（基數為1）                    , isInArray) {       //此物件是否在一個集合內                //如果為空，直接輸出null                if (obj == null) {
                    return "null";
                }
                //為普通型別，直接輸出值                if (obj.constructor == Number || obj.constructor == Date || obj.constructor == String || obj.constructor == Boolean) {
                    var v = obj.toString();
                    var tab = isInArray ? JsonUti.__repeatStr(JsonUti.t, level - 1) : "";
                    if (obj.constructor == String || obj.constructor == Date) {
                        //時間格式化只是單純輸出字串，而不是Date物件                        return tab + ("\"" + v + "\"");
                    }
                    else if (obj.constructor == Boolean) {
                        return tab + v.toLowerCase();
                    }
                    else {
                        return tab + (v);
                    }
                }
 
                //寫Json物件，快取字串                var currentObjStrings = [];
                //遍歷屬性                for (var name in obj) {
                    var temp = [];
                    //格式化Tab                    var paddingTab = JsonUti.__repeatStr(JsonUti.t, level);
                    temp.push(paddingTab);
                    //寫出屬性名                    temp.push(name + " : ");
 
                    var val = obj[name];
                    if (val == null) {
                        temp.push("null");
                    }
                    else {
                        var c = val.constructor;
 
                        if (c == Array) { //如果為集合，迴圈內部物件                            temp.push(JsonUti.n + paddingTab + "[" + JsonUti.n);
                            var levelUp = level + 2;    //層級+2 
                            var tempArrValue = [];      //集合元素相關字串快取片段                            for (var i = 0; i < val.length; i++) {
                                //遞迴寫物件                                                         tempArrValue.push(JsonUti.__writeObj(val[i], levelUp, true));
                            }
 
                            temp.push(tempArrValue.join("," + JsonUti.n));
                            temp.push(JsonUti.n + paddingTab + "]");
                        }
                        else if (c == Function) {
                            temp.push("[Function]");
                        }
                        else {
                            //遞迴寫物件                            temp.push(JsonUti.__writeObj(val, level + 1));
                        }
                    }
                    //加入當前物件“屬性”字串                    currentObjStrings.push(temp.join(""));
                }
                return (level > 1 && !isInArray ? JsonUti.n : "")                       //如果Json物件是內部，就要換行格式化                    + JsonUti.__repeatStr(JsonUti.t, level - 1) + "{" + JsonUti.n     //加層次Tab格式化                    + currentObjStrings.join("," + JsonUti.n)                       //串聯所有屬性值                    + JsonUti.n + JsonUti.__repeatStr(JsonUti.t, level - 1) + "}";   //封閉物件            },
            __isArray: function(obj) {
                if (obj) {
                    return obj.constructor == Array;
                }
                return false;
            },
            __repeatStr: function(str, times) {
                var newStr = [];
                if (times > 0) {
                    for (var i = 0; i < times; i++) {
                        newStr.push(str);
                    }
                }
                return newStr.join("");
            }
        };