function isBlank (curField,curValidate,sMessage,iBeg,iEnd) {
	bAllowed = true

	if (curValidate) {
		if (curField.value == '') {
			bAllowed = false
			curField.focus()
			alert(sMessage)
		}
	}
	else if (curField.value != '') {
		for (iChr = 0; iChr < curField.value.length; iChr++) {
			if (curValidate.indexOf(curField.value.charAt(iChr)) == -1) {
				bAllowed = false
			}
		}

		if ((!bAllowed) || (curField.value < iBeg) || (curField.value > iEnd)) {
			bAllowed = false
			curField.select()
			curField.focus()
			alert(sMessage)
		}
	}
	return (bAllowed)
}