function isValidContactUsInfo() {
	var strName = document.contactUs.strName.value
	var strEmail = document.contactUs.strEmail.value
	var strPhone = document.contactUs.strPhone.value
	if (isEmpty(strName)) {
		alert("Please enter your name.")
		document.contactUs.strName.focus()
		return false
	}
	if (isEmpty(strEmail) && isEmpty(strPhone)) {
		alert("Please provide us with a way to contact you: email or phone.")
		document.contactUs.strEmail.focus()
		return false
	}
	return true
}

function isValidReservationInfo() {
	var strName = document.makeReservation.strName.value
	var strEmail = document.makeReservation.strEmail.value
	var strPhone = document.makeReservation.strPhone.value
	var strDate = document.makeReservation.strDate.value
	var strTime = document.makeReservation.strTime.value
	var strSize = document.makeReservation.strSize.value
	if (isEmpty(strName)) {
		alert("Please enter your name.")
		document.makeReservation.strName.focus()
		return false
	}
	if (isEmpty(strEmail)) {
		alert("Please enter your email.")
		document.makeReservation.strEmail.focus()
		return false
	}
	if (isEmpty(strPhone)) {
		alert("Please provide us with your phone number.")
		document.makeReservation.strPhone.focus()
		return false
	}
	if (isEmpty(strDate)) {
		alert("Please enter the date for your reservation.")
		document.makeReservation.strDate.focus()
		return false
	}
	if (isEmpty(strTime)) {
		alert("Please enter the time.")
		document.makeReservation.strTime.focus()
		return false
	}
	if (isEmpty(strSize)) {
		alert("Please enter the number of people in your party.")
		document.makeReservation.strSize.focus()
		return false
	}
	return true
}

function isEmpty(inputStr) {
	if (inputStr == "" || inputStr == null) {
		return true
	}
	return false
}