<!--
monthdays = new Array("31", "28", "31", "30", "31", "30", "31", "31", "30", "31", "30", "31");

function getMthDays(year, month) {
  if(month < 1 || month > 12)
    return -1;
  if( month == 2 && (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) )
    return 29;
  else
    return parseInt(monthdays[month - 1]);
}

function validDate(year, month, day) {
  maxday = getMthDays(year, month);
  if(day > 0 && day <= maxday)
    return true;
  else
    return false;
}
//-->