var req;



function navigate(month,year,Lang) {

        var url = "calendar.php?month="+month+"&year="+year+"&Lang="+Lang;

        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("There was a problem retrieving the data:\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;

}