title: jquery to javascript - $.ajaxSetup()
body: <p>Since I am using ExtJs framework in my project I can't use jquery in my project. now I've a piece of code in jquery (given below), can someone help me to convert jquery into javascript? thanks</p>
  
  <pre><code>setup: function (networkErrorCallback) {
          this._networkErrorCallback = networkErrorCallback;
  
          var self = this;
          //$.support.cors = true;
          $.ajaxSetup({
              type: "GET",
              contentType: "application/json; charset=utf-8",
              dataType: "jsonp",
              jsonp: "method",
              timeout: 30000,
              error: function (XMLHttpRequest, textStatus, errorThrown) { self._networkErrorCallback(); },
              cache: false
          });
      }
  </code></pre>