js实现数组转换成json

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();  }