dates2 = false; // default for single entry visas, otherwise true

var neccessary_fields = new Array(  'VisaConsulateCountry',
									'VisaConsulateCity',
									'VisitCityList',
									'LastName',
									'FirstName',
									'MailAddress',
									'email2',
									'PhoneNumber',
									'JobAddress',
									'JobCountry',
									'JobCity',
									'JobZIPCode',
									'Citizenship',
									'PassportNumber' );
var neccessary_date_fields = new Array();
var date_fields_names = new Array('arrival', 'departure', '2nd arrival', '2nd departure');
var required_date_select_fields = new Array('VisitDateFrom', 'VisitDateTo', 'BirthDate', 'PassportDate', 'PassportValidityDate');
var required_radios = new Array('Gender');

function validate(f)
{	
	var value;
	if (dates2) {
		required_date_select_fields[required_date_select_fields.length] = 'VisitDateFrom2';
		required_date_select_fields[required_date_select_fields.length] = 'VisitDateTo2';
	}

	for (var i = 0; i < neccessary_date_fields.length; ++i) {
		value = f.elements[neccessary_date_fields[i]].value;
		if (!parseDate(value)) {
			alert('Invalid ' + date_fields_names[i] + ' date!');
			return false;
		}
	}
	
	for (var i = 0; i < required_date_select_fields.length; ++i) {
		if (!parseDateSelect(required_date_select_fields[i], f)) {
			alert('Please, fill out all required fields!');
			return false;
		}
	}
	
	for (i = 0; i < required_radios.length; ++i) {
		if (getRadioSelectedValue(f.elements[required_radios[i]]) == -1) {
			alert('Please, fill out all required fields.');
			return false;
		}
	}
	
	var arrival_date = parseDateSelect('VisitDateFrom', f);
	if (!dates2)
		var departure_date = parseDateSelect('VisitDateTo', f);
	else {
		var departure_date = parseDateSelect('VisitDateTo2', f);
		
		var departure_date1 = parseDateSelect('VisitDateTo', f);
		var arrival_date2 = parseDateSelect('VisitDateFrom2', f);
		
		if (arrival_date2 > departure_date || departure_date1 > arrival_date2) {
			alert('Invalid arrival/departure dates!');
			return false;
		}
	}
	
	var selected_visa = getRadioSelectedValue(f.ServiceCode);
	if (selected_visa == -1) {
		alert('Select type of visa service');
		return false;
	}
	
	var t = parseServiceCode(selected_visa);
	var visa_type = t[0];
	var visa_validity = t[1];
	
	var days_diff = (departure_date.getTime() - arrival_date.getTime()) / 86400 / 1000;
	if (!isFinite(days_diff) || days_diff < 0 || days_diff > (visa_validity * 31)) {
		if (visa_validity > 1)
			var mess = 'months';
		else
			var mess = 'month';
		alert('The period between arrival and departure can not be longer than ' + visa_validity + ' ' + mess + '.');
		return false;
	}
	
	for (var i = 0; i < neccessary_fields.length; ++i) {
		var val = f.elements[neccessary_fields[i]].value;
		if (!val.length) {
			alert('Please, fill out all required fields.');
			return false;
		}
	}
	
	//var regexp = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	var regexp = /^[^\s@]+@[^\s@]{2,}\.[a-z]{2,4}$/i;
	if (!regexp.test(f.MailAddress.value)) {
		alert('Email address is not valid');
		return false;
	}
	
	if (f.email2.value != f.MailAddress.value) {
		alert('Emails are not equal');
		return false;
	}				
	return true;
}

function getRadioSelectedValue(el_group)
{	
	if (typeof el_group.length == 'undefined') {
		if (el_group.checked)
			return el_group.value;
		else
			return -1;
	}
	for (var i = 0; i < el_group.length; ++i) {
		if (el_group[i].checked) {
			return el_group[i].value;			
		}
	}
	return -1;
}

function leftTrim(str, cut)
{
	for (var i = 0; i < str.length; ++i) {
		if (str.charAt(0) == cut.charAt(0)) 
			str = str.substr(1);
		else
			break;
	}
	return str;
}
	
function parseDateSelect(name, frm)
{
	var date_arr = new Array();
	var suffixes = new Array('DD', 'MM', 'YYYY');
	var el, val;
	for (var i = 0; i < suffixes.length; ++i) {
		el = frm.elements[name + suffixes[i]];
		val = parseInt(leftTrim(el.value, '0'));
		if (!val) {
			//throw true;
			return false;
		}
		date_arr[i] = val;
	}
	var date_obj = new Date(date_arr[2], date_arr[1] - 1, date_arr[0]);
	if (isNaN(date_obj) || !date_obj) {
		//throw true;
		return false;
	}
	return date_obj;
}

function parseDate(str)
{
	var date_arr = str.split('/', 3);
	if (date_arr.length != 3)
		return false;
	for (var i = 0; i < 3; ++i) {
		if (date_arr[i].charAt(0) == '0') 
			date_arr[i] = date_arr[i].substr(1, 1);
		date_arr[i] = parseInt(date_arr[i]);
	}
	var date_obj = new Date(date_arr[2], date_arr[1] - 1, date_arr[0]);
	if (isNaN(date_obj) || !date_obj)
		return false;
	return date_obj;
}		

function showTimeSpans(show)
{
	if (show) {
		dates2 = true;
		try {
			document.getElementById('time_span_0').style.display = '';
		}
		catch (e) {
		}
		document.getElementById('time_span_1').style.display = '';
		document.getElementById('time_span_2').style.display = '';
	}
	else {
		dates2 = false;
		try {
			document.getElementById('time_span_0').style.display = '';
		}
		catch (e) {
		}
		document.getElementById('time_span_1').style.display = 'none';
		document.getElementById('time_span_2').style.display = 'none';
	}
}

show_info_pane = true;

function showInfoPane(show)
{
	if (show_info_pane) {
		document.getElementById('info_pane').style.display = '';
	}
	else {
		document.getElementById('info_pane').style.display = 'none';
	}
	show_info_pane = !show_info_pane;
}

function showChildren(el)
{
	el.blur();
	var childs = parseInt(el.value);
	if (childs) 
		var disp_style = '';
	else
		var disp_style = 'none';
	for (var i = 1; i < 4; ++i) 
		document.getElementById('children_' + i).style.display = disp_style;
	addHtml('children_info_src', 'children_info', childs);	
}

function addHtml(src, dest, quantity)
{
	var src_html = document.getElementById(src).innerHTML;
	document.getElementById(dest).innerHTML = '';
	var regexp = /%NUM%/g;
	for (var i = 0; i < quantity; ++i) {
		document.getElementById(dest).innerHTML += '<br>' + src_html.replace(regexp, i);
	}
}

function parseServiceCode(selected_visa)
{
	var visa_type = selected_visa.substr(5, 1);
	var visa_validity = selected_visa.substr(6, 2);
	if (visa_validity.charAt(0) == '0')
		visa_validity.substr(1, 1);
	visa_validity = parseInt(visa_validity);
	/*
	if (visa_type == 'S' && visa_validity > 12)
		visa_validity = Math.round(visa_validity / 30);
	*/
	if (visa_validity == 30)
		visa_validity = 1;
	return new Array(visa_type, visa_validity);
}

function init()
{
	var t = parseServiceCode(getRadioSelectedValue(document.visa_order_form.ServiceCode));
	if (t[0] == 'S')
		showTimeSpans(false);
	else
		showTimeSpans(true);
}

window.onload = init;