(function($) { 
   
	function calendarWidget(el, params) { 
		
		var now   = new Date();
		var thismonth = now.getMonth();
		var thisyear  = now.getYear() + 1900;
		
		var opts = {
			month: thismonth,
			year: thisyear
		};
		
		$.extend(opts, params);
		
		var monthNames = ['Januari', 'Februari', 'Maart', 'April', 'Mei', 'Juni', 'Juli', 'Augustus', 'September', 'Oktober', 'November', 'December'];
		var dayNames = ['Zo', 'Ma', 'Di', 'Woe', 'Do', 'Vrij', 'Za'];
		month = i = parseInt(opts.month);
		year = parseInt(opts.year);
		var m = 0;
		var table = '';
		
			// next month
			if (month == 11) {
				var next_month = '<a href="?month=' + 1 + '&amp;year=' + (year + 1) + '" title="' + monthNames[0] + ' ' + (year + 1) + '">' + monthNames[0] + ' ' + (year + 1) + '</a>';
			} else {
				var next_month = '<a href="?month=' + (month + 2) + '&amp;year=' + (year) + '" title="' + monthNames[month + 1] + ' ' + (year) + '">' + monthNames[month + 1] + ' ' + (year) + '</a>';
			}
				
			// previous month
			if (month == 0) {
				var prev_month = '<a href="?month=' + 12 + '&amp;year=' + (year - 1) + '" title="' + monthNames[11] + ' ' + (year - 1) + '">' + monthNames[11] + ' ' + (year - 1) + '</a>';
			} else {
				var prev_month = '<a href="?month=' + (month) + '&amp;year=' + (year) + '" title="' + monthNames[month - 1] + ' ' + (year) + '">' + monthNames[month - 1] + ' ' + (year) + '</a>';
			}		
				
			table += ('<h3 id="current-month">'+monthNames[month]+' '+year+'</h3>');
			table += ('<table class="calendar-month " ' +'id="calendar-month'+i+' " cellspacing="0">');	
		
			table += '<tr>';
			
			for (d=0; d<7; d++) {
				table += '<th class="weekday">' + dayNames[d] + '</th>';
			}
			
			table += '</tr>';
		
			var days = getDaysInMonth(month,year);
            var firstDayDate=new Date(year,month,1);
            var firstDay=firstDayDate.getDay();
			
			var prev_days = getDaysInMonth(month,year);
            var firstDayDate=new Date(year,month,1);
            var firstDay=firstDayDate.getDay();
			
			var prev_m = month == 0 ? 11 : month-1;
			var prev_y = prev_m == 11 ? year - 1 : year;
			var prev_days = getDaysInMonth(prev_m, prev_y);
			firstDay = (firstDay == 0 && firstDayDate) ? 7 : firstDay;
			var i = 0;
            for (j=0;j<42;j++){
			  
              if ((j<firstDay)){
                table += ('<td class="other-month"><span class="day">'+ (prev_days-firstDay+j+1) +'</span></td>');
			  } else if ((j>=firstDay+getDaysInMonth(month,year))) {
				i = i+1;
                table += ('<td class="other-month"><span class="day">'+ i +'</span></td>');			 
              }else{
                table += ('<td class="current-month calendar_day_'+year+(month+1)+(j-firstDay+1)+'"><span class="day">'+(j-firstDay+1)+'</span></td>');
              }
              if (j%7==6)  table += ('</tr>');
            }

            table += ('</table>');

		el.html(table);
	}
	
	function getDaysInMonth(month,year)  {
		var daysInMonth=[31,28,31,30,31,30,31,31,30,31,30,31];
		if ((month==1)&&(year%4==0)&&((year%100!=0)||(year%400==0))){
		  return 29;
		}else{
		  return daysInMonth[month];
		}
	}
	
	
	// jQuery plugin initialisation
	$.fn.calendarWidget = function(params) {    
		calendarWidget(this, params);		
		return this; 
	}; 

})(jQuery);

function nextMonth(){
	current_month++;
	if(current_month > 11){
		current_month = 0;	
		current_year++;
	}
	getCalendar();
}

function prevMonth(){
	current_month--;		
	if(current_month < 0){
		current_month = 11;	
		current_year--;
	}			
	getCalendar();
}

$(function(){		
getCalendar();
	
	$('#next_month').click(function(e){
		e.preventDefault();
		nextMonth();
	});
	
	$('#prev_month').click(function(e){
		e.preventDefault();
		prevMonth();
	});
});

this.tooltip = function(selector, content){	
	/* CONFIG */		
		xOffset = -102;
		yOffset = 20;					
	/* END CONFIG */	
		
	$("td."+selector).hover(function(e){									  
		$("#calendar_tooltip div").html(content);
		$("#calendar_tooltip")
			.css("top",(e.pageY - yOffset) + "px")
			.css("left",(e.pageX + xOffset) + "px")
			.fadeIn("fast");
    },
	function(){		
		$("#calendar_tooltip").hide();
    });	
	$("td."+selector).mousemove(function(e){
		$("#calendar_tooltip")
			.css("top",(e.pageY - yOffset) + "px")
			.css("left",(e.pageX + xOffset) + "px");
	});			
};