var req;

function navigate(month,year) {
	var url = "/calendar/"+month+"/"+year;
	if(window.XMLHttpRequest) {
			 req = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
			 req = new ActiveXObject("Microsoft.XMLHTTP");
	}
	req.open("GET", url, true);
	req.onreadystatechange = callback;
	req.send(null);
}

function callback() {        
	obj = document.getElementById("calendar");
	//setFade(0);
	
	if(req.readyState == 4) {
			 if(req.status == 200) {
						response = req.responseText;
						obj.innerHTML = response;
					  // fade(0);
			 } else {
						alert("Klaida:\n" + req.statusText);
			 }
	}
}

function fade(amt) {
	if(amt <= 100) {
		setFade(amt);
		amt += 20;
		setTimeout("fade("+amt+")", 5);
    }
}

function setFade(amt) {
	obj = document.getElementById("calendar");
	
	amt = (amt > 98)?100: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;
}