// check the entered month for too high a value

function checkMonthLength(mm,dd) {

	var months = new Array("","January","February","March","April","May","June","July","August","September","October","November","December")

	if ((mm == 4 || mm == 6 || mm == 9 || mm == 11) && dd > 30) {

		alert(months[mm] + " has only 30 days.")

		return false

	} else if (dd > 31) {

		alert(months[mm] + " has only 31 days.")

		return false

	}

	return true

}



// check the entered February date for too high a value 

function checkLeapMonth(mm,dd,yyyy) {

	if (yyyy % 4 > 0 && dd > 28) {

		alert("February of " + yyyy + " has only 28 days.")

		return false

	} else if (dd > 29) {

		alert("February of " + yyyy + " has only 29 days.")

		return false

	}

	return true

}