// Date Minus 90/Minus 20

function isM90_M20Date() {

	if (gField.value.length == 0) return true

	var thisYear = getTheYear()

	return isDate((thisYear - 90),(thisYear - 20))

}



// Date Minus 70/Minus 0

function isM70_0Date() {

	if (gField.value.length == 0) return true

	var thisYear = getTheYear()

	return isDate((thisYear - 70),(thisYear))

}



// Date Minus 5/Plus 10

function isM5_P10Date() {

	if (gField.value.length == 0) return true

	var thisYear = getTheYear()

	return isDate((thisYear - 5),(thisYear + 10))

}



function getTheYear() {

	var thisYear = (new Date()).getYear()

	thisYear = (thisYear < 100)? thisYear + 1900: thisYear

	return thisYear

}