//====================================
// Form validation
//====================================

function isValidInquiryForm(form) {
	var msg = '';
	msg += requiredField(form.prospectName.value, 'Name');
	
	if (! isValidEmailAddress(form.prospectEmail.value)) {
		msg += "\n'Email' address is invalid.";
	} else {
		if (form.prospectEmail.value != form.confirmEmail.value) {
			msg += "\nEmail and Confirm Email must be the same.";
		}
	}
	
	//msg += checkMaxLength(form.message.value,'Message', 255);
	return finishValidation(msg);
}

function isValidLostPasswordForm(form) {
	var msg = '';
	if (! isValidEmailAddress(form.email.value)) {
		msg += "\n'Email' address is invalid.";
	}
	return finishValidation(msg);
}

function isValidPhotoEditForm(form)  {
	var msg = '';
	if (form.hasPhoto.value == 'no') { 
		msg += requiredFile(form.photoFile.value, 'Photo File');
	}
	if (msg == '') {
		form.btnSubmit.disabled = true;
		form.btnCancel.disabled = true;
		fDiv = document.getElementById('photoForm');
		fDiv.style.dislpay = 'none';
		waitDiv = document.getElementById('pleaseWait');
		waitDiv.style.display = 'block';
	}
	return finishValidation(msg);
}

function isValidListingForm(form) {
	var msg = '';
	var bedCnt = 0;
	msg += requiredField(form.countryCode.value,'Country');
	msg += requiredSelectOption(form.propertyType,'Property Type');	
	msg += nonZeroSelectOption(form.sleepsCount,'Sleeps');	
	//msg += nonZeroSelectOption(form.bedroomCount,'Bedrooms');	
	if (nonZeroSelectOption(form.kingBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (nonZeroSelectOption(form.queenBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (nonZeroSelectOption(form.doubleBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (nonZeroSelectOption(form.twinBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (nonZeroSelectOption(form.sofaBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (nonZeroSelectOption(form.bunkBedCount,'Bedrooms') == '') {
		bedCnt++;
	}
	if (bedCnt == 0) {
		msg += '\nPlease specify the number of each type of bed in the house.';
	}
	msg += requiredField(form.headline.value,'Headline');
	msg += requiredField(form.description.value,'Detailed Description');
	msg += requiredField(form.streetAddress.value,'Street Address');
	msg += requiredField(form.city.value,'City');
	stateMsg1 = requiredSelectOption(form.stateID,'State / Province');
	stateMsg2 = requiredField(form.otherState.value,'Other');
	if (stateMsg1 != '' && stateMsg2 != '') {
		msg += "\nSelect 'State/Province' from the list or enter a value in the 'Other' field.";
	}
	msg += requiredField(form.zip.value,'Zip/Postal Code');
	if (form.countryCode.value != 840 && trim(form.zip.value) == '') {
		msg += "\n\nIf your property  has no 'Zip/Postal Code', PLEASE ENTER: N/A.\n";
	}
	if (trim(form.publicEmail.value) == '' && trim(form.publicPhoneDay.value) == '' && trim(form.publicPhoneNight.value) == '') {
		msg += "\nPlease enter a phone number or email address.";
	} else if (trim(form.publicEmail.value) != '') {
		if (false == isValidEmailAddress(form.publicEmail.value)) {
			msg += "\n'E-mail address' is invalid.";
		}
	}
	return finishValidation(msg);
}

function isValidAccountEditForm(form) {
	var msg = '';
	msg += requiredField(form.firstName.value, 'First Name');
	msg += requiredField(form.lastName.value, 'Last Name');
	msg += requiredField(form.streetAddress.value, 'Mailing Address');
	msg += requiredField(form.city.value, 'City');	
	stateMsg1 = requiredSelectOption(form.stateID,'State / Province');
	stateMsg2 = requiredField(form.otherState.value,'Other');
	if (stateMsg1 != '' && stateMsg2 != '') {
		msg += "\nSelect 'State/Province' from the list or enter a value in the 'Other' field.";
	}
	msg += requiredField(form.zip.value, 'Zip/Postal Code');	
	msg += requiredSelectOption(form.countryCode,'Country');	
	return finishValidation(msg);
}

function isValidSignUpForm(form) {
	var msg = '';
	
	if (! isValidEmailAddress(form.email.value)) {
		msg += "\n'E-mail address' is invalid.";
	} else {
		msg += requiredField(form.confirmEmail.value, 'Confirm Email');
	}
	msg += requiredField(form.pass.value, 'Password');
	msg += requiredField(form.confirmPass.value, 'Confirm Password');
	msg += requiredField(form.firstName.value, 'First Name');
	msg += requiredField(form.lastName.value, 'Last Name');
	msg += requiredField(form.streetAddress.value, 'Mailing Address');
	msg += requiredField(form.city.value, 'City');	
	stateMsg1 = requiredSelectOption(form.stateID,'State / Province');
	stateMsg2 = requiredField(form.otherState.value,'Other');
	if (stateMsg1 != '' && stateMsg2 != '') {
		msg += "\nSelect 'State/Province' from the list or enter a value in the 'Other' field.";
	}
	msg += requiredField(form.zip.value, 'Zip/Postal Code');	
	msg += requiredSelectOption(form.countryCode,'Country');		
	
	if (msg == '') {
		if (form.email.value != form.confirmEmail.value) {
			msg += "\nEmail and Confirm Email must be the same.";
		}
		if (form.pass.value != form.confirmPass.value) {
			msg += "\nPassword and Confirm Password must be the same.";
		}
	}
	
	return finishValidation(msg);
}

//=============================================
// finishValidation() :
//=============================================
function finishValidation(msg) {
	if (msg != '') {
		alert(msg);
	}	
	return (msg == '');
}

//=============================================
// isEmptyField() :
//=============================================
function isEmptyField(fld) {
	return (trim(fld).length == 0);
}

//==============================================================
// isValidateDate(targetDate) : returns true if date is in YYYY-MM-DD format, otherwise returns false.
// IN: targetDate - the date to validate.
//==============================================================
function isValidateDate(targetDate) {
	// Date must be 10 characters.
	if (targetDate.length != 10) {
		return false;
	}
	
	// Check for a valid year.
	year = Number(targetDate.substr(0,4));
	today = new Date();
	currentYear = today.getFullYear();
	if ( (year  <  (currentYear - 1)) || (year > (currentYear  + 2)) ) {
		return false;
	}
	
	// Check for a valid month.
	month = Number(targetDate.substr(5,2));
	if (month < 1 || month > 12) {
		return false;
	}
	
	// Check for a valid day.
	day = Number(targetDate.substr(8,2));
	if (day < 1 || day > 31) {
		return false;
	}
	if (month == 2 && day > 29) {
		return false;
	}
	
	return true;
}
	
//=============================================
// isValidEmailAddress
//=============================================
function isValidEmailAddress(email) {
	// can't be empty
	if (isEmptyField(email)) return false;
	
	// can't contain any invalid character
	invalidChars = " /:,;";
	for (i=0;  i < invalidChars.length; i++) {
		badChar = invalidChars.charAt(i);
		if (email.indexOf(badChar,0) > -1) return false;
	}
	
	//  there must be one "@" character
	atPos = email.indexOf("@",1);
	if (atPos == -1) return false;
	
	// there must be at last one "." after the "@"
	dotPos = email.indexOf(".", atPos);
	if (dotPos == -1) return false;
	
	// there must be at least two characters after the "."
	if (dotPos + 3 > email.length) return false;
	
	return true;
}

//=============================================
// requiredFile
//=============================================
function requiredFile(fld, label) {
	msg = '';
	if (fld.length == 0) {
		msg = "\nPlease select a " + label + ".";
	}
	return msg;
}

//=============================================
// checkMaxLength
//=============================================
function checkMaxLength(fld, label, maxLen) {
	var msg = '';
	var fld = trim(fld);
	var extraChars = fld.length - maxLen;
	if (extraChars > 0) {
		msg = "\n'" + label + "' has too much text.  Please delete at least " + extraChars + " characters.";
	}
	return msg;
}

//=============================================
// requiredField
//=============================================
function requiredField(fld, label) {
	msg = '';
	fld = trim(fld);
	if (fld.length == 0) {
		msg = "\n'" + label + "' is required.";
	}
	return msg;
}

//=============================================
// requiredSelectOption
//=============================================
function requiredSelectOption(fld, label) {
	msg = '';
	idx = fld.selectedIndex;
	fldText = trim(fld.options[idx].text);
	if (fldText.length == 0) {
		msg = "\n'" + label + "' is required.";
	}
	return msg;
}

//=============================================
// Assumes that selected index value of 0 is a blank item.
//=============================================
function nonZeroSelectOption(sel, label) {
	msg = '';
	if (sel.selectedIndex == 0) {
		msg = "\n'" + label + "' is required.";
	}
	return msg;
}