function isDate(day, month, year) { 
	try
	{
	   if ((day < 1)||(day < 1 || day > 30) && (  month == 4 || month == 6 || month == 9 || month == 11 ) || day > 31) { 
	      return false; 
	   } 
	
	   if (month < 1 || month > 12 ) { 
	      return false;
	   } 
	
	   if( year == '' || year < 1900 )   {
	   	return false;
	   }
	       
	   if (month == 2 && ( day < 1 || day > 29 || ( day > 28 && (parseInt(year / 4) != year / 4)))) { 
	      return false;
	   } 
   }
   catch(Exception)
   {
		return false;
   }
   
   return true; 
}

function ValidateAge(validAge,year,month,day) {

  var byear = parseInt(year);	// year entered	
  var bmonth = parseInt(month);	// month entered
  var bday = parseInt(day);		// day entered

  var today = new Date();								// full date of today
  var currYear = today.getFullYear();						// year of today
  var currMonth = today.getMonth();						// month of today (0-11)
  var currDay = today.getDate();						// day of today (1-31)

	// add 1 to curr month since it is zero based
  currMonth += 1;				
	// # years diff between date entered and today
  var yearsDiff = currYear - byear;		
  
  // debug info ...
  //alert (byear + " " + currYear + "\n" + bmonth + " " + currMonth + "\n" + bday + " " + currDay);
  
  if (yearsDiff > validAge) {			// if yearsdiff > the valid age, let it pass
    //alert ("ok you old fart");
    return true; }
  else if (yearsDiff < validAge) {		// yearsdiff < validage, fail
    return false; }
  else {								// same year as threshold; use month/day to determine
    if (bmonth < currMonth) {			// had birthday in prior month this year - pass
		return true; }
	else if (bmonth > currMonth)  {		// haven't had your birthday yet this year - fail
		return  false; }  
	else {								// birthday is this month		
		if (bday <=	currDay) {			// birthday earlier this month or today
			return true;  }				
		else {							// birthday later this month - fail
			return false;   } 
		}  
		return false; } 
	return  false; 
}