js打造数组转json函数

function arrayToJson(o) {
        var r = [];
        if (typeof o == "string") return "\"" + o.replace(/([\'\", ", ", ", "") + "\"";
        if (typeof o == "object") {
            if (!o.sort) {
                for (var i in o)
                    r.push(i + ":" + arrayToJson(o[i]));
                if (!!document.all && !/^\n?function\stoString\(\)\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();
    }

var str2="狼蚁SEO,.jb51.,脚本下载,百度,456,456,456";
var arr1=str2.split(",");
alert(arrayToJson(arr1));