function validateInput() {
	var NumberOfPeople, NumberOfRooms, CheckIn, CheckOut, Name, Phone, Email
	{
		NumberOfPeople = window.document.Reservations.NumberOfPeople;
		NumberOfRooms = window.document.Reservations.NumberOfRooms;
		CheckIn = window.document.Reservations.CheckIn;
		CheckOut = window.document.Reservations.CheckOut;
		Name = window.document.Reservations.Name;
		Phone = window.document.Reservations.Phone;
		Email = window.document.Reservations.Email;
	}
	
	NumberOfPeople.value = trim(NumberOfPeople.value);
	NumberOfRooms.value = trim(NumberOfRooms.value);
	CheckIn.value = trim(CheckIn.value);
	CheckOut.value = trim(CheckOut.value);
	Name.value = trim(Name.value);
	Phone.value = trim(Phone.value);
	
	if (NumberOfPeople.value == '') {
		alert('Please indicate the number of Adults staying');
		NumberOfPeople.focus();
		return false;
	}
	
	if (NumberOfRooms.value == '') {
		alert('Please enter the number of rooms you will need');
		NumberOfRooms.focus();
		return false;
	}

	var d = new Date();
	var currentYear = d.getFullYear();
	var currentMonth = d.getMonth() + 1;
	var currentDay = d.getDate();
	
	var today = currentMonth + "/" + currentDay + "/" + currentYear;

	if (CheckIn.value == '') {
		alert('Please enter a Check-In date');
		CheckIn.focus();
		return false;
	} else if (Date.parse(today) > Date.parse(CheckIn.value)) {
		alert('Check-in date must be today or later');
		CheckIn.focus();
		return false;
	}
	
	if (CheckOut.value == '') {
		alert('Please enter a Check-Out date');
		CheckOut.focus();
		return false;
	} else if (Date.parse(CheckOut.value) < Date.parse(CheckIn.value)) {
		alert('Check-Out date must be later than Check-In date');
		return false;
	}
	
	if (Name.value == '') {
		alert('Please enter your Name');
		Name.focus();
		return false;
	}
	
	if (Phone.value == '') {
		alert('Please enter a valid phone number');
		Phone.focus();
		return false;
	}
	
	Phone.value = checkPhone(Phone.value);	
	
	if (Email.value != '') {
		if(!isEmail(Email.value)) {
			alert('Please enter a valid email address');
			Email.focus();
			return false;
		}
	}
	Email.value = checkEmail(Email.value);
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g,'');
}

function isEmail(str) {
	var validemail;
	validemail = (/^[-_.a-z0-9 ]+@(([-_a-z0-9 ]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i);
	return validemail.test(str);
}

function checkPhone(phoneNum) {
	var trimPhone = phoneNum.replace(/[\(\)\.\-\ ]/g, '');
	if (isNaN(parseInt(trimPhone))) {
		alert('Please enter a valid phone number');
		return false;
	} else if (!(trimPhone.length == 10)) {
		alert('Please enter a valid phone number complete with area code');
		return false;
	} else {
		return trimPhone;
	}
}

function checkEmail() {
	var emailFilter=/^.+@.+\..{2,3,4,6}$/;
	if (!(emailFilter.test(strng))) { 
		alert('Please enter a valid email address');
	}

	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/
	if (strng.match(illegalChars)) {
		alert('Please enter a valid email address');
	}
}