var req;

function navigate(month,year,evt) {
	setFade(0);
	var url = "/halo/super_calendar.php?month="+month+"&year="+year+"&event="+evt;
	xml=GetXmlHttpObject();
	if (xml==null) return false;
	xml.onreadystatechange=function(){
		if(xml.readyState==4){
			document.getElementById("calendar").innerHTML = xml.responseXML.getElementsByTagName("response")[0].getElementsByTagName("content")[0].childNodes[0].nodeValue;
			fade(70);
		}
	};
	xml.open("GET",url,true);
	xml.send(null);
}

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

function setFade(amt) {
	var obj = document.getElementById("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
		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');
	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="/halo/jscripts/calendar/images/calGo.gif" alt="go" /></a> <a href="javascript:hideJump()"><img src="/halo/jscripts/calendar/images/calStop.gif" alt="close" /></a>';
	jump.innerHTML = output;
	document.body.appendChild(jump);
}

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

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