var polls = 0;
var pollTimer;
window.onload = function() {
  $("fullResponse").src = "countdown.phtml?start=3";
  pollTimer = setInterval(function() {
    var iFrameBody = extractIFrameBody($("fullResponse"));
    $("response").innerHTML = (++polls) +
      ". Text=" + extractIFrameBody($("fullResponse")).innerHTML + "<br/>";
  }, 1000);
}

function createXMLHttpRequest() {
  try { return new ActiveXObject("Msxml2.XMLHTTP");    } catch(e) {}
  try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {}
  try { return new XMLHttpRequest();                   } catch(e) {}
  alert("XMLHttpRequest not supported");
  return null;
}