js creates array to json function_javascript skills

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?functions*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="Script Home, www.jb51.net, Script Download, Baidu, 456,456,456";
var arr1=str2.split(",");
alert(arrayToJson(arr1));