function calendar(mois){

        var date = new Date();
        var day = date.getDate();
        var month = date.getMonth();
        var year = date.getYear();

        if(year<=200)
        {
                year += 1900;
        }
        months = new Array('Janvier', 'F&eacute;vrier', 'Mars', 'Avril', 'Mai', 'Juin', 'Juillet', 'Ao&ucirc;t', 'Septembre', 'Octobre', 'Novembre', 'D&eacute;cembre');
        days_in_month = new Array(31,28,31,30,31,30,31,31,30,31,30,31);

        var moisaujorduiu = month;

        month = mois;

        //ano bissesto, muda dia fevereiro
        if(year%4 == 0 && year!=1900)
        {
                days_in_month[1]=29;
        }


        total = days_in_month[month]; //days month

        var date_today = day+' '+months[month]+' '+year;//22 ouctober 2014

        beg_j = date; //today date

        beg_j.setDate(1);


        if(beg_j.getDate()==2) //1
        {
                beg_j=setDate(0);
        }
        beg_j = beg_j.getDay();

        document.write('<table class="cal_calendar"><tr><th colspan="7">'+months[mois]+' '+year+'</th></tr><br>');
        document.write('<tr class="cal_d_weeks"><th>Dim</th><th>Lun</th><th>Mar</th><th>Mer</th><th>Jeu</th><th>Ven</th><th>Sam</th></tr><tr>');
        week = 0;

        for(i=1;i<=beg_j;i++)
        {
                var beforemonth = months[month-1];

               document.write('<td><div class ="divday" />'+(days_in_month[month-1]-beg_j+i)+'</div></td>');
                week++;
        }
        for(i=1;i<=total;i++)
        {
                if(week==0)
                {
                    document.write("<tr>");
                }

                if(day==i && moisaujorduiu==month) //si le jour = le jour de aujordhui est si le mois = mois aujordui
                {

                    document.write("<td><b><div class ='divtoday' onclick='open_popup(""+i+" "+months[month]+"")' href='#'>"+i+"</div><b></td>"); //day of today
                }
                //les autre jours
                else
                {

                    document.write("<td><div class ='divday' onclick='open_popup(""+i+" "+months[month]+"")' href='#'>"+i+"</div></td>");
                }
                week++;
                if(week==7)
                {
                        document.write('</tr>');
                        week=0;
                }
        }

            //pour les jour du prochain mois

             for(i=1;week!=0;i++)
            {
                    var nextmonth = months[month+1];
                    document.write('<td><div class ="divday">'+i+'</td>');
                    week++;
                    if(week==7)
                    {
                            document.write('</tr>');
                            week=0;
                    }
            }
        document.write('</table>');

<table border=0 width=100% height=100%>
        <tr>
            <td>
                    <script type="text/javascript">
                        var mois = 0; //janvier
                        calendar(mois);
                    </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 1; //fevrier
                calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 2; //mars
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 3; //avril
                    calendar(mois);
                </script>
            </td>
        </tr>
        <tr>
            <td>
                <script type="text/javascript">
                    var mois = 4;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 5;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 6;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 7;
                    calendar(mois);
                </script>
            </td>
        </tr>
        <tr>
            <td>
                <script type="text/javascript">
                    var mois = 8;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 9;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 10;
                    calendar(mois);
                </script>
            </td>
            <td>
                <script type="text/javascript">
                    var mois = 11;
                    calendar(mois);
                </script>
            </td>
        </tr>
    </table>