function arrayToJson(o) {        var r = [];        if (typeof o == "string") return "\"" + o.replace(/([\‘\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";        if (typeof o == "object") {            if (!o.sort) {                for (var i in o)                    r.push(i + ":" + arrayToJson(o[i]));                if (!!document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {                    r.push("toString:" + o.toString.toString());                }                r = "{" + r.join() + "}";            } else {                for (var i = 0; i < o.length; i++) {                    r.push(arrayToJson(o[i]));                }                r = "[" + r.join() + "]";            }            return r;        }        return o.toString();    }
作用相当于  JSON.stringify(array);