var reqe;

function big_navigate(month,year,evt) {
	big_setFade(0);
	var url = SITEROOT + "js/calendar/big_super_calendar.php?month="+month+"&year="+year+"&event="+evt;
	if(window.XMLHttpRequest) {
		reqe = new XMLHttpRequest();
	} else if(window.ActiveXObject) {
		reqe = new ActiveXObject("Microsoft.XMLHTTP");
	}
	reqe.open("GET", url, true);
	reqe.onreadystatechange = big_callback;
	reqe.send(null);
}

function big_callback() {
	if(reqe.readyState == 4) {
		var response = reqe.responseXML;
		var resp = response.getElementsByTagName("response");
		big_getObject("big_calendar").innerHTML = resp[0].getElementsByTagName("content")[0].childNodes[0].nodeValue;
		big_fade(70);
	}
}

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

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

function big_setFade(amt) {
	var obj = big_getObject("big_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 big_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","big_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:big_jumpTo()"><img src="' + SITEROOT + 'js/calendar/images/calGo.gif" alt="go" /></a> <a href="javascript:big_hideJump()"><img src="' + SITEROOT + 'js/calendar/images/calStop.gif" alt="close" /></a>';
	_jump.innerHTML = _output;
	document.body.appendChild(_jump);
}

function big_hideJump() {
	document.body.removeChild(big_getObject("big_jump"));
}

function big_jumpTo() {
	var m = big_getObject("month");
	var y = big_getObject("year");
	big_navigate(m.options[m.selectedIndex].value,y.options[y.selectedIndex].value,'');
	big_hideJump();
}