var vidreq;
function getvid(ut){

var url="video/video.php?_ut="+ut
  if(window.XMLHttpRequest) {
          vidreq = new XMLHttpRequest();
  } else if(window.ActiveXObject) {
          vidreq = new ActiveXObject("Microsoft.XMLHTTP");
  }
  vidreq.open("GET", url, true);
  vidreq.onreadystatechange = callback_vid;
  vidreq.send(null);
}
function callback_vid() {
  obj_vid = document.getElementById("video_window");
	if(vidreq.readyState == 4) {
    if(vidreq.status == 200) {
      response = vidreq.responseText;
      obj_vid.innerHTML = response;
    } else {
      alert("Probléma az adatok betöltése közben:\n" + req.statusText);
    }
  }
}