var req;

function navigate(month,year,locid) {
        var url = "calendar.php?month="+month+"&year="+year+"&locid="+locid;
		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("Failed to load the calendar. Please refresh the page:\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;
}