var calreq;
function getcal(datum,ut){

var url="main/naptar.php?d="+datum+"&_ut="+ut;
  if(window.XMLHttpRequest) {
          calreq = new XMLHttpRequest();
  } else if(window.ActiveXObject) {
          calreq = new ActiveXObject("Microsoft.XMLHTTP");
  }
  calreq.open("GET", url, true);
  calreq.onreadystatechange = callback;
  calreq.send(null);
}
function callback() {
  obj = document.getElementById("calendar");
//  setFade(0);
	if(calreq.readyState == 4) {
    if(calreq.status == 200) {
      response = calreq.responseText;
      obj.innerHTML = response;
//      fade(0);
    } else {
      alert("Probléma az adatok betöltése közben:\n" + req.statusText);
    }
  }
}
function fade(amt) {
	if(amt <= 100) {
		setFade(amt);
		amt += 10;
		setTimeout("fade("+amt+")", 5);
    }
}

function setFade(amt) {
	obj = document.getElementById("calendar");
	
	amt = (amt == 100)?99.999:amt;
  
	// IE
	obj.style.filter = "alpha(opacity:"+amt+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = amt/100;
	// Mozilla and Firefox
	obj.style.MozOpacity = amt/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = amt/100;
}