var CalendarDates;

var ns6 = document.getElementById && !document.all;
var ie4 = document.all;

var SelectedMonth,SelectedYear;

var CurrentDate	= new Date();
var DaysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
var MonthLabel	= new Array('Januar', 'Februar', 'Marts', 'April', 'Maj', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'December');
var DayLabel	= new Array(['M','Man','Mandag'],['T','Tir','Tirsdag'],['O','Ons','Onsdag'],['T','Tor','Torsdag'],['F','Fre','Fredag'],['L','Lør','Lørdag'],['S','Søn','Søndag']);

var MonthLabelFormat 	= 1;
var DayLabelFormat 		= 0;

var CurrentMonth	= CurrentDate.getMonth();
var CurrentYear 	= CurrentDate.getFullYear();
var Today 			= CurrentDate.getDate();

function fn_InitCalendar()
{
	SelectedMonth	= CurrentMonth;
	SelectedYear 	= CurrentYear;
	try
    {
		fn_LoadCalendar(CurrentYear, CurrentMonth, 1);
    }
    catch(e)
    {
    	CalendarDates = new Array();
		fn_LoadCalendar(CurrentYear, CurrentMonth, 1);
    }
}

function fn_LoadCalendar(Year, Month, bRunOnce)
{
	var FirstDate 	= new Date(Year, Month, 0);
	var Heading 	= fn_GetHeader(Year, Month);
	var FirstDay 	= FirstDate.getDay();
	var Rows		= 5;
    
	if (((DaysInMonth[Month] == 31) && (FirstDay >= 5)) || ((DaysInMonth[Month] == 30) && (FirstDay == 6)))
	{
		Rows = 6;
	}
	else if ((DaysInMonth[Month] == 28) && (FirstDay == 0))
	{
		Rows = 4;
	}

	var sHtml  = '<div id="oCalendar" class="oCalendar">';
		sHtml += '<table border="0" cellspacing="1" cellpaddding="0" width="100%">';
		sHtml += '<tr>';

        if(SelectedYear >= CurrentYear)
		{
            if(SelectedMonth > CurrentMonth || SelectedYear > CurrentYear)
            {
                sHtml += '	<td align="right" class="oCalendarMonthLabelBackward"><div style="text-align:center;cursor:pointer;" onclick="Skip(\'-\');"><<</div></td>';
            
            }else{
            
                sHtml += '	<td align="left" class="oCalendarMonthLabelNone">&nbsp;</td>';
            }
            
		} else {
        
			sHtml += '	<td align="left" class="oCalendarMonthLabelNone">&nbsp;</td>';
        }
        
		sHtml += '	<td colspan="5" class="oCalendarMonthLabel">'+ Heading +'</td>';
       
		if((SelectedMonth >= CurrentMonth) || (SelectedYear >= CurrentYear))
        {
			sHtml += '	<td align="right" class="oCalendarMonthLabelForward"><div style="text-align:center;cursor:pointer;" onclick="Skip(\'+\');">>></div></td>';
		
        }else{
		
        	sHtml += '	<td align="right" class="oCalendarMonthLabelNone">&nbsp;</td>';
        }

        sHtml += '</tr>';
		sHtml += '<tr>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[0][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[1][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[2][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[3][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[4][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[5][DayLabelFormat] +'</td>';
		sHtml += '	<td class="oCalendarDayLabel">'+ DayLabel[6][DayLabelFormat] +'</td>';
		sHtml += '</tr>';

		var DayCounter		= 1;
		var LoopCounter 	= 0;

		for (var j = 1; j <= Rows; j++)
		{
			sHtml += '<tr>';
			
			for (var i = 1; i < 8; i++)
			{
				if ((LoopCounter >= FirstDay) && (DayCounter <= DaysInMonth[Month]))
				{
					var ArrayLenght = CalendarDates.length -1;
                    var MarkOn = false;
                    
                    for(var x = 0; x < ArrayLenght; x++)
                    {
                    	if(SelectedMonth == (CalendarDates[x][4] -1) && SelectedYear == (CalendarDates[x][5]))
                        {
                            if (DayCounter >= CalendarDates[x][0] && DayCounter <= CalendarDates[x][1])
                            {
                                MarkOn 		= true;
                                MarkLink 	= CalendarDates[x][3];
                                MarkTitle 	= CalendarDates[x][2];
                            }
                        } 
                    }

					if(MarkOn)
                    {
                    	if(Today == DayCounter)
                        {
                            if(SelectedMonth == CurrentMonth && SelectedYear == CurrentYear)
                            {
	                        	sHtml += '<td class="oCalendarNowDayOnMark" style="cursor:pointer;" onclick="location.href=\'http://www.fyens-rideklub.dk/default.asp?ptype='+ MarkLink +'\'" title="'+ MarkTitle +'">'+ DayCounter +'</td>';
							} else {
                            	sHtml += '<td class="oCalendarDayOnMark" style="cursor:pointer;" onclick="location.href=\'http://www.fyens-rideklub.dk/default.asp?ptype='+ MarkLink +'\'" title="'+ MarkTitle +'">'+ DayCounter +'</td>';
                        	}
                            
                        } else {
                        
                            if(SelectedMonth == CurrentMonth && SelectedYear == CurrentYear)
                            {
	                        	sHtml += '<td class="oCalendarDayOnMark" style="cursor:pointer;" onclick="location.href=\'http://www.fyens-rideklub.dk/default.asp?ptype='+ MarkLink +'\'" title="'+ MarkTitle +'">'+ DayCounter +'</td>';
	                        } else {
                            	sHtml += '<td class="oCalendarDayOnMark" style="cursor:pointer;" onclick="location.href=\'http://www.fyens-rideklub.dk/default.asp?ptype='+ MarkLink +'\'" title="'+ MarkTitle +'">'+ DayCounter +'</td>';
    						}
                        }
                        
                       	MarkOn = false;
                    }
                    else
                    {
                    	if(Today == DayCounter)
                        {
                            if(SelectedMonth == CurrentMonth && SelectedYear == CurrentYear)
                            {
    	                    	sHtml += '<td class="oCalendarNowDay">'+ DayCounter +'</td>';
                        	} else {
	                            sHtml += '<td class="oCalendarDay">'+ DayCounter +'</td>';
							}                        
                        } else {
                        
                        	sHtml += '<td class="oCalendarDay">'+ DayCounter +'</td>';
                        }
                    }
				
					DayCounter++; 
				}
				else
				{
					sHtml += '<td class="oCalendarNoDay">&nbsp;</td>';
				}
				
				LoopCounter++;
			}
			
			sHtml += '</tr>';
		}
		
	sHtml += '</table>';
	sHtml += '</div>';
	
    if(bRunOnce)
    {
		document.write('<div id="oMWMcalendar">'+ sHtml +'</div>');
    } else {
    	document.getElementById('oMWMcalendar').innerHTML = sHtml;
    }
}

function fn_GetHeader(Year, Month)
{
	if (Month == 1)
	{
		DaysInMonth[1] = ((Year % 400 == 0) || ((Year % 4 == 0) && (Year % 100 !=0))) ? 29 : 28;
	}

	return HeaderString = MonthLabel[Month] + ' ' + Year;
}

function Skip(Direction)
{
	if (Direction == '+')
	{
	
		if (SelectedMonth == 11)
		{
			SelectedMonth = 0;
			SelectedYear++;
		}
		else
		{
			SelectedMonth++;
		}
	}
	else
	{
		if (SelectedMonth == 0)
		{
			SelectedMonth = 11;
			SelectedYear--;
		}
		else
		{
			SelectedMonth--;
		}
	}

	fn_LoadCalendar(SelectedYear, SelectedMonth, 0);
}