var loader = Titanium.Network.createHTTPClient();
       loader.onload = function() {
      alert("Hello");
        }
      loader.onError = function(e)
        alert("Error: " + e.error);
     }

// add url in here
loader.open("GET",'[URL HERE]');
// Send the request.
loader.send();

var xhrSitelogin = Titanium.Network.createHTTPClient();
xhrSitelogin.open('POST', webservice_url);
xhrSitelogin.send({
method : "userlogin",
username : username,
password : password
});
xhrSitelogin.setTimeout(10000);

xhrSitelogin.onerror = function() {
showAlertBox('Service timed out. Please try again.');
//Hide Indicator
};
xhrSitelogin.onload = function() {

  alert(this.responseText);
   //RESPONSE RECEIVED
};

var api_url = 'http://myawesomeapi.heroku.com/users/' +

taskRequest.onload = function() {

        var tasks = [];

        // code populating the tasks array

        alert(tasks);

        callback( tasks ); // invoke the callback
    }

    taskRequest.open('GET', api_url, false);

    taskRequest.setRequestHeader('Content-Type', 'application/json');

    taskRequest.send();

loader.open("POST/GET","URL");
loader.onload(response){
//get the response
console.log(this.responseText);

};
loader.send();
 Use this pattern.