function zmienStyl()
{
  var url = "http://localhost/dane.txt";
  var btn1 = document.getElementById("btn1");
  btn1.disabled = true;
  startGETRequest(url, onComplete, onEnd);
}

function onComplete(responseText, responseXML)
{
  var div1 = document.getElementById("div1");
  div1.className = responseText;
}

function onEnd()
{
  var btn1 = document.getElementById("btn1");
  btn1.disabled = false;
}
