function twitterCallback(dataobj) {
	var obj = dataobj[0];
	if (obj) {
		var createdData = new Date(obj.created_at),
		favourited = obj.favourited,
		postSource = obj.source,
		content = obj.text,
		user = {
			description : obj.user.description,
			followers : obj.user.followers_count,
			following : obj.user.friends_count,
			location : obj.user.location,
			name : obj.user.name,
			profileImage : obj.user.profile_image_url,
			updateCount : obj.user.statuses_count
		}, returnHTML, postTimeAgo;
		postTimeAgo = relative_time(obj.created_at);
		returnHTML = '<span>'+content+' <a href="http://twitter.com/modelrailUK">posted '+postTimeAgo+' - Follow us!</a></span>';
		document.getElementById('tweets').innerHTML = returnHTML;
	} else {
		if(console) console.log(dataobj);
	}
}

function relative_time(time_value) {
  var values = time_value.split(" ");
  time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
  var parsed_date = Date.parse(time_value);
  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
  var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
  delta = delta + (relative_to.getTimezoneOffset() * 60);

  if (delta < 60) {
    return 'less than a minute ago';
  } else if(delta < 120) {
    return 'about a minute ago';
  } else if(delta < (60*60)) {
    return (parseInt(delta / 60)) + ' minutes ago';
  } else if(delta < (120*60)) {
    return 'about an hour ago';
  } else if(delta < (24*60*60)) {
    return 'about ' + (parseInt(delta / 3600)) + ' hours ago';
  } else if(delta < (48*60*60)) {
    return '1 day ago';
  } else {
    return (parseInt(delta / 86400)) + ' days ago';
  }
}