var bDate = 0;
var eDate = 0;
var mDown = false;
var firstday = 0;
var lastday  = 0;

function processDates (){
	cbDate	 = parseFloat(bDate.replace(/-/g,''));
	ceDate	 = parseFloat(eDate.replace(/-/g,''));
	if (cbDate>ceDate) 
	{
		tmp 	= bDate;
		bDate	= eDate;
		eDate	= tmp;
	}

	window.location = 'events.php?a=list&b=' + bDate + '&e=' + eDate;
}

var compareCal = 0;
var prevClass = '';

function createCalendar(parentID, theID, idname, type) {

	var theBody = document.getElementById(parentID);
	var theCal = document.createElement('div');
	var theInput = document.createElement('input');
	var compareCal = 0;

	theInput.id = theID;
	theCal.id = idname;
	theCal.name = idname;
	theInput.value = idname;
	theInput.type = 'hidden';
	theBody.appendChild(theInput);
	theBody.appendChild(theCal);

	var currentTime = new Date();
	var month = currentTime.getMonth() + 1;
	//var day = currentTime.getDate();
	var day = 0;
	var year = currentTime.getFullYear();

	ajax(month, year, day, theID, type);
}
function deselect () {
	if (document.selection) {
		document.selection.empty();
	} else if (window.getSelection) {
		window.getSelection().removeAllRanges();
	}
}
function calHighlight (begin,end,myClass) {
	if (begin>end) 
	{
		tmp 	= begin;
		begin	= end;
		end	= tmp;
	}
	for (i=begin;i<=end;i++) {
		changeClass(i, myClass);
	}
}
function changeClass(Elem, myClass) {
	var elem;
	Elem = 'c'+Elem;
	if(document.getElementById) {
		var elem = document.getElementById(Elem);
	} else if (document.all){
		var elem = document.all[Elem];
	}
	if (prevClass!='') {
 		prevClass = '';
	} else {
		prevClass = elem.className;

	}
	elem.className = myClass;
}
function uMouseEvent (evt, xid, month, year, day){
	if (day<10) {day='0'+day}
	deselect();
	switch (evt) {
		case 'down':
			mDown = true;
			bDate = year + '-' + month + '-' + day;
			eDate = bDate;

			calHighlight (firstday,lastday,'c_transparent');

			cbDate	 = parseFloat(bDate.replace(/-/g,''));
			changeClass(cbDate, 'c_select');



			break;
		case 'up':
			if (mDown) {
				mDown = false;

				if (bDate!=0) {
					processDates();
				}
				break;
			}
		case 'over':
			thisday = year + '-' + month + '-' + day;
			cbDate	 = parseFloat(thisday.replace(/-/g,''));
			changeClass(cbDate, 'c_mo');

			if (mDown) {

				calHighlight (firstday,lastday,'c_transparent');

				eDate=thisday;

				cbDate	 = parseFloat(bDate.replace(/-/g,''));
				ceDate	 = parseFloat(eDate.replace(/-/g,''));

				calHighlight (cbDate,ceDate,'c_select');
			}

			break;
		default : //out
			thisday = year + '-' + month + '-' + day;
			cbDate	 = parseFloat(thisday.replace(/-/g,''));
			changeClass(cbDate, prevClass);
			//xid.ClassName = 'c_mouseout';
			break;
	}
}

function ajax(nmonth, nyear, nday, xnid, ntype){

	var param = '?nday=' + nday + '&nmonth=' + nmonth + '&nyear=' + nyear + '&nid=' + xnid + '&ntype=' + ntype + '&width=' + '170' + '&height=' + '180';
        if(window.XMLHttpRequest) {
                request = new XMLHttpRequest();
        } else if(window.ActiveXObject) {
                request = new ActiveXObject("Microsoft.XMLHTTP");
        }

	params = '/_classes/class.calendar.php' + param;
	//alert(params);
	InitializeTimer(param);
	request.open('GET', params, true);
	request.onreadystatechange = parse_result;
        request.send(null);
}

function parse_result(){
        if(request.readyState == 4) {
                if(request.status == 200) {
			var answer = trimme(request.responseText);
			//alert(answer);
			var nx= answer.split('|');
			eval(nx[1]);
			var ans = nx[2];
			for(i = 3; i < nx.length; i++) 
				ans = ans + '|' + nx[i];
				theId = document.getElementById(nx[0]).value;
			//alert(theId);
				document.getElementById(theId).innerHTML = ans;
			StopTheClock();

			return true;
		} else {
			return false;
		}
	} else {
		return false;
	}
}

function trimme(sInString) {
  	sInString = sInString.replace ( /^\s+/g, '' );// strip leading
	return sInString.replace( /\s+$/g, '' );// strip trailing
}

function regenerateCal(nmonth, nyear, nday, nid, ntype) {
	//alert(document.getElementById(nid + '_day').value);
	if(compareCal == 1) {
		var val_cal1 = (nid == cal1 ? nyear : document.getElementById(cal1 + '_year').value) + '' + (nid == 'cal1' ? (nmonth < 10 ? '0'+nmonth : nmonth) : (document.getElementById(cal1 + '_month').value < 10 ? '0'+document.getElementById(cal1 + '_month').value : document.getElementById(cal1 + '_month').value)) + '' + (nid == cal1 ? (nday < 10 ? '0'+nday : nday) : (document.getElementById(cal1 + '_day').value < 10 ? '0'+document.getElementById(cal1 + '_day').value : document.getElementById(cal1 + '_day').value)); 
		var val_cal2 = (nid == cal2 ? nyear : document.getElementById(cal2 + '_year').value) + '' + (nid == cal2 ? (nmonth < 10 ? '0'+nmonth : nmonth) : (document.getElementById(cal1 + '_month').value < 10 ? '0'+document.getElementById(cal1 + '_month').value : document.getElementById(cal1 + '_month').value)) + '' + (nid == cal2 ? (nday < 10 ? '0'+nday : nday) : (document.getElementById(cal1 + '_day').value < 10 ? '0'+document.getElementById(cal1 + '_day').value : document.getElementById(cal1 + '_day').value));

		if(val_cal2 < val_cal1) {
			document.getElementById(alertCal).innerHTML = 'Invalid time selection';
		}
		else if(val_cal2 >= val_cal1) {
			document.getElementById(alertCal).innerHTML = '';
		}
	}
	ajax(nmonth, nyear, nday, nid, ntype);
}

var secs;
var timerID = null;
var timerRunning = false;
var delay = 1000;
var tick = 0;

function InitializeTimer(param)
{
    // Set the length of the timer, in seconds
    secs = 5;
    StopTheClock()
    StartTheTimer(param)
}

function StopTheClock()
{
    if(timerRunning)
        clearTimeout(timerID)
    timerRunning = false
}

function StartTheTimer(param)
{
    if (secs==0)
    {
	if(!parse_result())
		{ 
			if (tick<2) {
				request = 0;
				ajax(param);
				StopTheClock();
				tick++;
			} else {
				answer = 'connection failed.<br />' + eval('document.getElementById(\'' + idname + '\').innerHTML');
				eval('document.getElementById(\'' + idname + '\').innerHTML = answer');
				tick = 0;
			}
		};
    }
    else
    {
        self.status = secs
        secs = secs - 1
        timerRunning = true
        timerID = self.setTimeout("StartTheTimer()", delay)
    }
}