function maakkalenderdiv(left,top) {
  var t = '';

  t ='<div id="kalenderholderdiv" style="position:relative;">'+
     '<div id="kalenderfloatdiv" style="position:absolute; left:'+left+'px; top:'+top+'px; width:674px; height:272px; background-color:#fdf7d1; border:1px solid #000000; display:none;">'+
       '<table width="100%" cellspacing="0" cellpadding="0" border="0">'+
       '<tr>'+
         '<td align="left">'+
           '<table cellspacing="0" cellpadding="0" border="0">'+
           '<tr>'+
             '<td>&nbsp;</td>'+
             '<td class="kalender_navigatieknop" onclick="javascript:planbordnavigatie(-3)">&nbsp;3 maanden terug&nbsp;</td>'+
           '</tr>'+
           '</table>'+
         '</td>'+
         '<td align="center">'+
           '<table>'+
           '<tr>'+
             '<td width="16"><a href="javascript:planbordnavigatie(-12)"><img title="1 jaar terug" src="/images/zoekboek/JaarTerug.gif" border="0"></a></td>'+
             '<td width="16"><a href="javascript:planbordnavigatie(-1)"><img title="1 maand terug" src="/images/zoekboek/MaandTerug.gif" border="0"></a></td>'+
             '<td width="16"><a href="javascript:planbordnavigatie(0)"><img title="deze maand" src="/images/zoekboek/DezeMaand.gif" border="0"></a></td>'+
             '<td width="16"><a href="javascript:planbordnavigatie(1)"><img title="1 maand verder" src="/images/zoekboek/MaandVerder.gif" border="0"></a></td>'+
             '<td width="16"><a href="javascript:planbordnavigatie(12)"><img title="1 jaar verder" src="/images/zoekboek/JaarVerder.gif" border="0"></a></td>'+
             '<td width="16"><a href="javascript:kalenderfloatdiv_hide()"><img title="kalender sluiten" src="/images/general/cal_sluiten.gif" border="0"></a></td>'+
           '</tr>'+
           '</table>'+
         '</td>'+
         '<td align="right">'+
           '<table cellspacing="0" cellpadding="0" border="0">'+
           '<tr>'+
             '<td class="kalender_navigatieknop" onclick="javascript:planbordnavigatie(3)">&nbsp;3 maanden verder&nbsp;</td>'+
             '<td>&nbsp;</td>'+
           '</tr>'+
           '</table>'+
         '</td>'+
       '</tr>'+
       '</table>'+
       '<table>'+
       '<tr>'+
         '<td><span id="maand01span"></span></td>'+
         '<td><span id="maand02span"></span></td>'+
         '<td><span id="maand03span"></span></td>'+
       '</tr>'+
       '</table>'+
     '</div>'+
     '</div>';

  return t;
}

function kalenderfloatdiv_show() {
  getid('kalenderfloatdiv').style.display='inline';
  if (bezaankomstdatum>0) {
    dt_firstmonth = new Date(bezaankomstdatum);
    dt_firstmonth.setUTCDate(1);
    dt_firstmonth.setUTCMonth(dt_firstmonth.getUTCMonth()-1);
  }
  planbordupdate(houseid);
}

function kalenderfloatdiv_hide() {
  getid('kalenderfloatdiv').style.display='none';
}