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('Janvier',
'Février',
'Mars',
'Avril',
'Mai',
'Juin',
'Juillet',
'Aout',
'Septembre',
'Octobre',
'Novembre',
'Décembre');

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.round((next_month.getTime() - this_month.getTime()) / (1000 * 60 * 60 * 24));

calendar_html = '<table align="center" style="background-color:#5a3a22; color:#000000;">';

calendar_html += '<tr><td colspan="7" align="center" style="background-color:#5a3a22; color:#bef574;">' + 
        months[month] + ' ' + year + '</td></tr>';

calendar_html += '<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 style="background-color:#bef574; color:#5a3a22;"> </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:#5a3a22; color:#bef574;"><b>' + day_counter + '</b></td>';
   else
      calendar_html += '<td align="center" style="background-color:#bef574; color:#5a3a22;"> ' + 
     day_counter + ' </td>';
   
   week_day++;
   }
   
calendar_html += '</tr>';
calendar_html += '</table>';

//Display the calendar.     
document.write(calendar_html);
}