(function($) { 
   
	function calendarWidget(el, params) { 
		
		var now   = new Date();
		var thismonth = now.getMonth();
		var thisyear  = now.getFullYear();

		var opts = {
			month: thismonth,
			year: thisyear
		};
		
		$.extend(opts, params);
		
		var monthNames = ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'];
		var dayNames = ['D', 'S', 'T', 'Q', 'Q', 'S', 'S'];
		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>';
				url_next_month = 1 ;
				url_next_year = year;
				
			} else {
				var next_month = '<a href="?month=' + (month + 2) + '&amp;year=' + (year) + '" title="' + monthNames[month + 1] + ' ' + (year) + '">' + monthNames[month + 1] + ' ' + (year) + '</a>';
				url_next_month = month + 2 ;
				url_next_year = year ;
			}
				
			// 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 + 1 ) + '&amp;year=' + (year) + '" title="' + monthNames[month + 1] + ' ' + (year) + '">' + monthNames[month + 1] + ' ' + (year) + '</a>';
			}		
				
			table += ('<h3 id="current-month">'+monthNames[month]+'</h3>');
			// uncomment the following lines if you'd like to display calendar month based on 'month' and 'view' paramaters from the URL
			//table += ('<div class="nav-prev">'+ prev_month +'</div>');
			//table += ('<div class="nav-next">'+ next_month +'</div>');
			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;
			var prev_y = prev_m == 11 ? year: 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"><a href="agenda.php?data=' + prev_y + '-' + prev_m + '-' + (prev_days-firstDay+j+1) + '">' + (prev_days-firstDay+j+1) +'</a></span></td>');
			  } else if ((j>=firstDay+getDaysInMonth(month,year))) {
				i = i+1;
                table += ('<td class="other-month"><span class="day"><a href="agenda.php?data=' + (year) + '-' + url_next_month  + '-' + i + '">' + i +'</span></td>');			 
              }else{
                table += ('<td class="current-month day'+(j-firstDay+1)+'"><span class="day"><a href="agenda.php?data=' + url_next_year + '-' + (month+1) + '-' + (j-firstDay+1) + '">'+(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);