var req;

// crea l'oggetto per la comunicazione AJAX con il server   
function crea_http_req() {   
    var req = false;   
        if (typeof XMLHttpRequest != "undefined")   
	        req = new XMLHttpRequest();   
		    if (!req && typeof ActiveXObject != "undefined") {   
		            try {   
			                req=new ActiveXObject("Msxml2.XMLHTTP");   
					        } catch (e1) {   
						            try {   
							                    req=new ActiveXObject("Microsoft.XMLHTTP");   
									                } catch (e2) {   
											                try {   
													                    req=new ActiveXObject("Msxml2.XMLHTTP.4.0");   
															                    } catch (e3) {   
																	                        req=null;   
																				                }   
																						            }   
																							            }   
																								        }   
																									  
																									      if(!req && window.createRequest)   
																									              req = window.createRequest();
																										          
																											      if (!req) alert("Il browser non supporta AJAX");   
																											        
																												    return req;   
																												    }   
																												    

function navigate(month,year,evt) {
	setFade(0);
	var url = "http://www.salastampa.info/calendar/super_calendar.php?month="+month+"&year="+year+"&event="+evt;
	
	req = crea_http_req();
	req.open("GET", url, true);
	
	req.onreadystatechange = callback;
	req.send(null);
}

function callback() {	
	if(req.readyState == 4) {
		var response = req.responseXML.documentElement;	
		
		var resp = response.getElementsByTagName('response')[0];
		

		getObject("calendar").innerHTML = response.getElementsByTagName('content')[0].childNodes[0].nodeValue;
		fade(70);
	}
}

function getObject(obj) {
	var o;
	if(document.getElementById) o = document.getElementById(obj);
	else if(document.all) o = document.all.obj;	
	return o;	
}

function fade(amt) {
	if(amt <= 100) {
		setFade(amt);
		amt += 10;
		setTimeout("fade("+amt+")", 5);
    }
}

function setFade(amt) {
	var obj = getObject("calendar");
	amt = (amt == 100)?99.999:amt;
	obj.style.filter = "alpha(opacity:"+amt+")";
	obj.style.KHTMLOpacity = amt/100;
	obj.style.MozOpacity = amt/100;
	obj.style.opacity = amt/100;
}

function showJump(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft -50
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	var jump = document.createElement("div");
	jump.setAttribute("id","jump");
	jump.style.position = "absolute";
	jump.style.top = curtop+15+"px";
	jump.style.left = curleft+"px";
	var output = '<select id="month">\n';
	
  var months=new Array('January','February','March','April','May','June','July','August','September','October','November','December');
  if(	CAL_MONTH_NAMES){
   months=CAL_MONTH_NAMES;
   }
	var n;
	for(var i=0;i<12;i++) {
		n = ((i+1)<10)? '0'+(i+1):i+1;
		output += '<option value="'+n+'">'+months[i]+'  </option>\n';
	}
	output += '</select> \n<select id="year">\n';
	for(var i=0;i<=15;i++) {
		n = (i<10)? '0'+i:i;
		output += '<option value="20'+n+'">20'+n+'  </option>\n';
	}
	output += '</select> <a href="javascript:jumpTo()"><img src="http://amgd.ro/super_ajax_calendar/calendar/images/calGo.gif" alt="go" /></a> <a href="javascript:hideJump()"><img src="http://amgd.ro/super_ajax_calendar/calendar/images/calStop.gif" alt="close" /></a>';
	jump.innerHTML = output;
	document.body.appendChild(jump);
}

function hideJump() {
	document.body.removeChild(getObject("jump"));	
}

function jumpTo() {
	var m = getObject("month");
	var y = getObject("year");
	navigate(m.options[m.selectedIndex].value,y.options[y.selectedIndex].value,'');
	hideJump();
}