function reflectDay(mon, day, year) {
        var mo;
        var yr;
        var now = day.selectedIndex;
        var mnow = mon.selectedIndex;
        if (year.nodeName == 'SELECT')
        {
          var ynow = year.selectedIndex;
          var yrString = (ynow < 0) ? "undefined" : year[year.selectedIndex].value;
          if (ynow >= 0) {
              yr = parseInt(year[year.selectedIndex].value,10);
          } else {
              yr = 0
          }
        }
        else
        {
          yrString = year.value;
          yr = parseInt(yrString);
        }
        var dayString = (now < 0) ? "undefined" : day[day.selectedIndex].value;
        var monString = (mnow < 0) ? "undefined" : mon[mon.selectedIndex].value;


        if (mnow >= 0) {
            mo = parseInt(mon[mon.selectedIndex].value,10);
        } else {
            mo = 0
        }


        if (mo == 4 || mo == 6 || mo == 9 || mo == 11) {
        for (i = day.length + 1; i <= 30; i++) {
        addDay(day,i);
      }
      for (i = day.length; i > 30 ;i--) {
        yankDay(day,i);
      }
        } else {
        if (mo == 2) {
        for (i = day.length; i > 29 ;i--) {
            yankDay(day,i);
        }
        if ( yr % 4 > 0 || (yr % 100 == 0 && yr % 400 > 0)) {
            yankDay(day,29);
        } else {
            for (i = day.length + 1; i <= 29; i++) {
            addDay(day,i);
          }
        }
      } else {
        for (i = day.length + 1; i <= 31; i++) {
            addDay(day,i);
        }
      }
        }
        if (now >= day.length) {
        day.selectedIndex = day.length - 1;
      dayString = day[day.selectedIndex].value;
        }

        var dateString = yrString+"-"+monString+"-"+dayString;
        return dateString
    }

    function yankDay(field,day) {
    ind = day - 1;
    start = field.selectedIndex;
        if (isNaN(start)) { start = -1; }
        field.options[ind] = null;
      field.selectedIndex = start;
        }

    function addDay(field,day) {
    ind = day - 1;
    start = field.selectedIndex;
        if (isNaN(start)) { start = -1; }
        field.options[ind] = new Option (day);
      field.selectedIndex = start;
    }

    function getFormIndexByElement(el){
        var i = 0;
        for (i=0;i<document.forms.length;i++){
            if (document.forms[i] == el.form){
                return i;
            }
        }
    }


    function updateHiddenDate(el,field_name,hidden_name){
        var i = getFormIndexByElement(el);
        var frm = 'document.forms['+i+'].';
        var hh24,hh24_e;

        var yy = eval(frm +field_name+'_yyyy');
        var mm = eval(frm +field_name+'_mm');
        var dd = eval(frm +field_name+'_dd');
        var sdate;
        var dd_sel = dd.selectedIndex +1;
        if (yy.selectedIndex >= 0 && mm.selectedIndex >= 0 && dd_sel >= 1){
            sdate = yy[yy.selectedIndex].value+"-"+mm[mm.selectedIndex].value+"-"+(dd_sel>9?dd_sel:'0'+dd_sel);
            var hh;
            if (typeof (hh = eval(frm +field_name+'_hh')) != "undefined"){
                var mi = eval(frm +field_name+'_mi');
                var am = eval(frm +field_name+'_am');
                hh24 = zeroPad(parseInt(hh[hh.selectedIndex].value,10)+12*parseInt(am[am.selectedIndex].value,10));
                hh24 = hh24+':'+mi[mi.selectedIndex].value+':'+'00';
            }
            else {
                hh24 = '00:00:00';
            }

            var hidden_field = eval(frm + hidden_name);
            hidden_field.value = sdate+' '+hh24;
            var e_hh;
            if (typeof (e_hh = eval(frm +field_name+'_e_hh')) != "undefined"){
                var e_mi = eval(frm +field_name+'_e_mi');
                var e_am = eval(frm +field_name+'_e_am');
                var hidden_field_end = eval(frm + hidden_name+'_end');
                var e_hh24= zeroPad(parseInt(e_hh[e_hh.selectedIndex].value,10)+12*parseInt(e_am[e_am.selectedIndex].value,10));
                hidden_field_end.value = sdate +' ' + e_hh24+':'+e_mi[e_mi.selectedIndex].value+':'+'00';
            }
        }
    }