function getNews() {
  var ajax = new Ajax();
  var url = "news.php";
  ajax.doGet(url, showNews, 'xml');
}

function showNews(response) {
  var items = response.getElementsByTagName('item');
  var titles = response.getElementsByTagName('title');
  var descrs = response.getElementsByTagName('description');
  var links = response.getElementsByTagName('link');
  var pubDates = response.getElementsByTagName('pubDate');

  var news = document.getElementById('news');
  news.innerHTML = "";

  for (var i = 2; i < items.length; i++) {
    var li = document.createElement('li');
    var link = document.createElement('a');
    link.href = links[i].firstChild.data;
    link.target = "_blank";
    link.appendChild(document.createTextNode(titles[i].firstChild.data));
    li.appendChild(link);
    li.appendChild(document.createElement('br'));
    li.appendChild(document.createElement('br'));
    news.appendChild(li);
  }
}

window.onload = getNews;