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();
    }

var str2="武林網,www.49028c.com,腳本下載,百度,456,456,456"; 
var arr1=str2.split(","); 
alert(arrayToJson(arr1));