function calendar(date)
         {
         //If no parameter is passed use the current date.
         //if(date == null)
         //   date = new Date();
         
         day = date.getDate();
         month = date.getMonth();
         year = date.getFullYear();
         
         months = new Array('JANEIRO',
                            'FEVEREIRO',
                            'MARÇO',
                            'ABRIL',
                            'MAIO',
                            'JUNHO',
                            'JULHO',
                            'AGOSTO',
                            'SETEMBRO',
                            'OUTOBRO',
                            'NOEMBRO',
                            'DEZEMBRO');

	   dias = new Array('D','S','T','Q','Q','S','S');
         
         this_month = new Date(year, month, 1);
         next_month = new Date(year, month + 1, 1);
         
         //Find out when this month starts and ends.         
         first_week_day = this_month.getDay();
         days_in_this_month = Math.floor((next_month.getTime() - this_month.getTime()) / (1000 * 60 * 60 * 24));
         
         calendar_html = '<div class=calendario><table cellpadding=0 cellspacing=0 border=0>';         
         calendar_html += '<tr><td colspan="7" style="border:none;" align=center>' + 
                          months[month] + ' ' + year + '</td></tr>'
         
         calendar_html += '<tr>';

         //Colocar o nome dos dias da semana.       
         for(k = 0; k < 7; k++)
            {
            calendar_html += '<td class=calendariop align=center>'+dias[k]+'</td>';   
            }

         calendar_html += '</tr><tr>';
          
         //Fill the first week of the month with the appropriate number of blanks.       
         for(week_day = 0; week_day < first_week_day; week_day++)
            {
            calendar_html += '<td>&nbsp;</td>';   
            }
            
         week_day = first_week_day;
         for(day_counter = 1; day_counter <= days_in_this_month; day_counter++)
            {
            week_day %= 7;
            
            if(week_day == 0)
               calendar_html += '</tr><tr>';
            
            //Do something different for the current day.
            if(day == day_counter)   
               calendar_html += '<td align="center" style="background-color:#ff9c00; color:#FFFFFF;"><b>' + day_counter + '</b></td>';
            else
               calendar_html += '<td align="center" >&nbsp;' + 
                                day_counter + '&nbsp;</td>';
            
            week_day++;
            }
            
         calendar_html += '</tr>';
         calendar_html += '</table></div>';
         
         //Display the calendar.     
         document.write(calendar_html);                  
         }