/* --- Swazz Javascript Calendar ---
/* --- v 1.0 3rd November 2006
By Oliver Bryant
http://calendar.swazz.org */

var monthAbbrArray = new Array('JAN','FEB','MAR','APR','MAY','JUN','JUL','AUG','SEP','OCT','NOV','DEC');
var normalLastDayOfMonthArray = new Array('31','28','31','30','31','30','31','31','30','31','30','31');
var leapYearLastDayOfMonthArray = new Array('31','29','31','30','31','30','31','31','30','31','30','31');
var calendarSquareArray=new Array(42);

function GetObject(objID)
{
    if (document.getElementById) {return document.getElementById(objID);}
    else if (document.all) {return document.all[objID];}
    else if (document.layers) {return document.layers[objID];}
}

function CheckClickEvent(e) 
{
	e?evt=e:evt=event;
	CSE=evt.target?evt.target:evt.srcElement;
	if (GetObject('theCalendar'))
		if (!IsChildObject(CSE,GetObject('theCalendar')))
			GetObject('theCalendar').style.display='none';
}

function IsChildObject(s,d) 
{
	while(s) 
	{
		if (s==d)
		{
			return true;
		}
		s=s.parentNode;
	}
	return false;
}

function SetLeft(obj)
{
	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)
	{
		curleft += obj.x;
	}
	return curleft+40;
}

function SetTop(obj)
{
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)
	{
		curtop += obj.y;
	}
	return curtop;
}

// begin writing calendar layer
document.write('<table id="theCalendar" style="position:absolute;border-collapse:collapse;background:#FFFFFF;border:1px solid #ABABAB;display:none" cellpadding=2>');
document.write('<tr><td style="cursor:pointer" onclick="ChangeToPrevMonth()"><img src="../images/arrowleftmonth.gif"></td><td colspan=5 id="monthNameTD" align="center" style="font:bold 13px Arial"></td><td align="right" style="cursor:pointer" onclick="ChangeToNextMonth()"><img src="../images/arrowrightmonth.gif"></td></tr>');
document.write('<tr><td align=center style="background:#ABABAB;font:12px Arial">S</td><td align=center style="background:#ABABAB;font:12px Arial">M</td><td align=center style="background:#ABABAB;font:12px Arial">T</td><td align=center style="background:#ABABAB;font:12px Arial">W</td><td align=center style="background:#ABABAB;font:12px Arial">T</td><td align=center style="background:#ABABAB;font:12px Arial">F</td><td align=center style="background:#ABABAB;font:12px Arial">S</td></tr>');
for(var kk = 1; kk <= 6; kk++) 
{
	document.write('<tr>');
	for(var tt = 1; tt <= 7; tt++) 
	{
		num=7 * (kk-1) - (-tt);
		document.write('<td id="tnc' + num + '" style="width:18px;height:18px">&nbsp;</td>');
	}
	document.write('</tr>');
}
document.write('</table>');

document.all?document.attachEvent('onclick',CheckClickEvent):document.addEventListener('click',CheckClickEvent,false);
// end writing calendar layer


// Calendar script
var globalDaysOut = 1;
var globalNow = new Date;
/*var globalStartDate = new Date;
alert("globalNow.getDate() + globalDaysOut: '" + (globalNow.getDate() + globalDaysOut) + "'");
globalStartDate.setDate(globalNow.getDate() + globalDaysOut);*/
var globalStartDayOfMonth = globalNow.getDate();
var globalStartMonth = globalNow.getMonth();
var globalStartYear = globalNow.getFullYear();

var thisLastDayOfGlobalStartMonthArray = ((globalStartYear % 4) == 0)?leapYearLastDayOfMonthArray:normalLastDayOfMonthArray;
var lastDayGlobalStartMonth = thisLastDayOfGlobalStartMonthArray[globalStartMonth];
if(globalStartDayOfMonth == lastDayGlobalStartMonth)
{
	globalStartDayOfMonth = 1;
	if(globalStartMonth != 11)
	{
		globalStartMonth++;
	}
	else
	{
		globalStartMonth = 1;
		globalStartYear++;
	}
}
var globalStartDate = new Date();
globalStartDate.setFullYear(globalStartYear, globalStartMonth, globalStartDayOfMonth);
var globalCurrentMonth = globalStartMonth;
var globalCurrentYear = globalStartYear;

var globalDateTextBoxObject;
function LoadTheCalendar(dateTextBox) 
{
	globalDateTextBoxObject = dateTextBox;
	GetObject('theCalendar').style.left = SetLeft(dateTextBox) + 20;
	GetObject('theCalendar').style.top = SetTop(dateTextBox) + dateTextBox.offsetHeight;
	GetObject('theCalendar').style.display = '';
//	GetObject('dd1').style.display='none';
	
	// First check date is valid
	var selectedCurrentDate = dateTextBox.value;
	var selectedCurrentDateArray = selectedCurrentDate.split('/');
	isDate = true;
	for(var k = 0; k < selectedCurrentDateArray.length; k++) 
	{
		if (isNaN(selectedCurrentDateArray[k]))
		{
			isDate=false;
		}
	}
	if (isDate & (selectedCurrentDateArray.length == 3)) 
	{
		selectedCurrentMonth = selectedCurrentDateArray[0]-1;
		selectedCurrentDay = selectedCurrentDateArray[1];
		selectedCurrentYear = selectedCurrentDateArray[2];
		var selectedDate = new Date();
		selectedDate.setFullYear(selectedCurrentYear, (selectedCurrentMonth), selectedCurrentDay);
		if(selectedDate >= globalStartDate)
		{
			PrepTheCalendar(selectedCurrentDay, selectedCurrentMonth, selectedCurrentYear);
		}
		else
		{
			dateTextBox.value = "";
			PrepTheCalendar(globalStartDay, globalStartMonth, globalStartYear);
		}
	}
}

function SetEventTarget(e)
{
	var el;
	if(e.target) el=e.target;
	else if(e.srcElement) el=e.srcElement;
	if(el.nodeType==3) el=el.parentNode; // defeat Safari bug
	return el;
}

function GrabEventObject(e)
{
	if(!e) e=window.event;
	return e;
}

function AddMouseOverEventToTarget(e) 
{
	SetEventTarget(GrabEventObject(e)).style.background='#FFCC66';
}

function AddMouseOutEventToTarget(e) 
{
	SetEventTarget(GrabEventObject(e)).style.background='#C4D3EA';
}

function AddOnClickEventToTarget(e) 
{
	// set date textbox value
//	alert("SetEventTarget(GrabEventObject(e)).id.length: '" + SetEventTarget(GrabEventObject(e)).id.length + "'");
	globalDateTextBoxObject.value = calendarSquareArray[SetEventTarget(GrabEventObject(e)).id.substring(3,SetEventTarget(GrabEventObject(e)).id.length)];
	// re-hide calendar
	GetObject('theCalendar').style.display = 'none';
}

function SetDayAvailableStyle(obj) 
{
	obj.style.background='#C4D3EA';
	obj.style.font='10px Arial';
	obj.style.color='#333333';
	obj.style.textAlign='center';
	obj.style.textDecoration='none';
	obj.style.border='1px solid #6487AE';
	obj.style.cursor='pointer';
}

function SetDayNotAvailableStyle(obj) 
{
	obj.style.background='#C4D3EA';
	obj.style.font='10px Arial';
	obj.style.color='#ABABAB';
	obj.style.textAlign='center';
	obj.style.textDecoration='line-through';
	obj.style.border='1px solid #6487AE';
	obj.style.cursor='default';
}

function SetDaySelectedStyle(obj) 
{
	obj.style.background='#FFF799';
	obj.style.font='bold 10px Arial';
	obj.style.color='#333333';
	obj.style.textAlign='center';
	obj.style.border='1px solid #6487AE';
	obj.style.cursor='pointer';
}

// day selected
function PrepTheCalendar(theDay, theMonth, theYear) 
{
	startDate = globalStartDayOfMonth;
	firstDayOfMonth = new Date();
	firstDayOfMonth.setDate(1);
	firstDayOfMonth.setFullYear(theYear);
	firstDayOfMonth.setMonth(theMonth);
	firstDayOfMonthDayOfWeekNum = firstDayOfMonth.getDay();

	GetObject('monthNameTD').innerHTML = monthAbbrArray[theMonth]+ ' ' + theYear;
	thisLastDayOfMonthArray = ((theYear % 4) == 0)?leapYearLastDayOfMonthArray:normalLastDayOfMonthArray;
	for(var d = 1; d <= 42; d++) 
	{
		SetDayAvailableStyle(GetObject('tnc'+parseInt(d)));
		if ((d >= (firstDayOfMonthDayOfWeekNum -(-1))) && (d <= firstDayOfMonthDayOfWeekNum - (-thisLastDayOfMonthArray[theMonth]))) 
		{
			dateIsNotAvailable = ((d - firstDayOfMonthDayOfWeekNum < startDate) && (theMonth == globalStartMonth) && (theYear == globalStartYear));
			dateIsSelected = ((theDay != '') && (d - firstDayOfMonthDayOfWeekNum == theDay));
			if(dateIsNotAvailable)
			{
				SetDayNotAvailableStyle(GetObject('tnc'+parseInt(d)));
			}
			else if(dateIsSelected)
			{
				SetDaySelectedStyle(GetObject('tnc'+parseInt(d)));
			}
			else
			{
				SetDayAvailableStyle(GetObject('tnc'+parseInt(d)));
			}

			GetObject('tnc' + parseInt(d)).onmouseover = (dateIsNotAvailable)?null:AddMouseOverEventToTarget;
			GetObject('tnc' + parseInt(d)).onmouseout = (dateIsNotAvailable)?null:AddMouseOutEventToTarget;
			GetObject('tnc' + parseInt(d)).onclick = (dateIsNotAvailable)?null:AddOnClickEventToTarget;
			GetObject('tnc' + parseInt(d)).innerHTML = d - firstDayOfMonthDayOfWeekNum;	

			calendarSquareArray[d] = '' + (theMonth - (-1)) + '/' + ((d - firstDayOfMonthDayOfWeekNum)) + '/' + theYear;
		}
		else 
		{
			GetObject('tnc'+d).innerHTML='&nbsp;';
			GetObject('tnc'+parseInt(d)).onmouseover=null;
			GetObject('tnc'+parseInt(d)).onmouseout=null;
			GetObject('tnc'+parseInt(d)).style.cursor='default';
		}
	}
}

PrepTheCalendar('',globalStartMonth,globalStartYear);
//GetObject('theCalendar'+cc).style.visibility='hidden';

function ChangeToNextMonth() 
{
	thisLastDayOfMonthArray=((globalCurrentYear%4)==0)?leapYearLastDayOfMonthArray:normalLastDayOfMonthArray;
	
	globalCurrentMonth+=1;
	if (globalCurrentMonth>=12) 
	{
		globalCurrentMonth=0;
		globalCurrentYear++;
	}
	DayOfMonthCheck();
	PrepTheCalendar('',globalCurrentMonth,globalCurrentYear);
}

function ChangeToPrevMonth() 
{
	thisLastDayOfMonthArray=((globalCurrentYear%4)==0)?leapYearLastDayOfMonthArray:normalLastDayOfMonthArray;
	
	globalCurrentMonth-=1;
	if (globalCurrentMonth < 0) 
	{
		globalCurrentMonth=11;
		globalCurrentYear--;
	}
	DayOfMonthCheck();
	PrepTheCalendar('',globalCurrentMonth,globalCurrentYear);
}

function DayOfMonthCheck() 
{
	if ((globalCurrentYear > globalStartYear) || ((globalCurrentYear == globalStartYear) && (globalCurrentMonth >= globalStartMonth)))
	{
		return;
	}
	else 
	{
		globalCurrentYear=globalStartYear;
		globalCurrentMonth=globalStartMonth;
//		cfd=globalStartDayOfMonth;
	}
}