/* Tigra Calendar http://www.softcomplex.com/products/tigra_calendar/ Version: 3.2 Permission given to use this script in ANY kind of applications if header lines are left unchanged. */

var NUM_CENTYEAR = 30;
var BUL_TIMECOMPONENT = false; // is time input required
var BUL_YEARSCROLL = false; // is year scroll required
var calendars = [];
var RE_NUM = /^\-?\d+$/;

// generate calendar
function calendar(obj_target) {
	this.gen_date = cal_gen_date;
	this.gen_time = cal_gen_time;
	this.gen_tsmp = cal_gen_tsmp;
	this.prs_date = cal_prs_date;
	this.prs_time = cal_prs_time;
	this.prs_tsmp = cal_prs_tsmp;
	this.popup = cal_popup;
	if (!obj_target) return cal_error("Error calling the calendar: no target control specified");
	if (obj_target.value == null) return cal_error("Error calling the calendar: parameter specified is not valid target control");
	this.target = obj_target;
	this.time_comp = BUL_TIMECOMPONENT;
	this.year_scroll = BUL_YEARSCROLL;
	this.id = calendars.length;	calendars[this.id] = this; }

// popup window
function cal_popup (str_datetime) {
	this.dt_current = this.prs_tsmp(str_datetime ? str_datetime : this.target.value);
	if (!this.dt_current) return;
	var obj_calwindow = window.open('/orderforms/express/calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,'Calendar', 'width=200,height='+(this.time_comp ? 215 : 190)+',status=no,resizable=no,top=450,left=637,dependent=yes,alwaysRaised=yes');
	obj_calwindow.opener = window;
	obj_calwindow.focus(); }

// timestamp
function cal_gen_tsmp (dt_datetime) {
	return(this.gen_date(dt_datetime) + ' ' + this.gen_time(dt_datetime)); }

// date generator
function cal_gen_date (dt_datetime) {
	return ((dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "/" + (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "/" + dt_datetime.getFullYear()); }
	
// time generator
function cal_gen_time (dt_datetime) {
	return ((dt_datetime.getHours() < 10 ? '0' : '') + dt_datetime.getHours() + ":"	+ (dt_datetime.getMinutes() < 10 ? '0' : '') + (dt_datetime.getMinutes()) + ":"	+ (dt_datetime.getSeconds() < 10 ? '0' : '') + (dt_datetime.getSeconds())); }

// parse timestamp
function cal_prs_tsmp (str_datetime) {
	if (!str_datetime) return (new Date());
	if (RE_NUM.exec(str_datetime)) return new Date(str_datetime);
	var arr_datetime = str_datetime.split(' ');
	return this.prs_time(arr_datetime[1], this.prs_date(arr_datetime[0])); }

// parse date
function cal_prs_date (str_date) {
	var arr_date = str_date.split('/');
	if (arr_date.length != 3) return alert ("Invalid date format ... '" + str_date + "'.\nFormat accepted is dd-mm-yyyy.");
	if (!arr_date[1]) return alert ("Invalid date format: '" + str_date + "'.\nNo day of month value can be found.");
	if (!RE_NUM.exec(arr_date[1])) return alert ("Invalid day of month value ... '" + arr_date[1] + "'.\nAllowed values are integers.");
	if (!arr_date[0]) return alert ("Invalid date format: '" + str_date + "'.\nNo month value can be found.");
	if (!RE_NUM.exec(arr_date[0])) return alert ("Invalid month value ... '" + arr_date[0] + "'.\nAllowed values are integers.");
	if (!arr_date[2]) return alert ("Invalid date format: '" + str_date + "'.\nNo year value can be found.");
	if (!RE_NUM.exec(arr_date[2])) return alert ("Invalid year value ... '" + arr_date[2] + "'.\nAllowed values are integers.");
	var dt_date = new Date();
	dt_date.setDate(1);
	if (arr_date[0] < 1 || arr_date[0] > 12) return alert ("Invalid month value ... '" + arr_date[0] + "'.\nAllowed range is 01-12.");
	dt_date.setMonth(arr_date[0]-1);
	if (arr_date[2] < 100) arr_date[2] = Number(arr_date[2]) + (arr_date[2] < NUM_CENTYEAR ? 2000 : 1900);
	dt_date.setFullYear(arr_date[2]);
	var dt_numdays = new Date(arr_date[2], arr_date[0], 0);
	dt_date.setDate(arr_date[1]);
	if (dt_date.getMonth() != (arr_date[0]-1)) return alert ("Invalid day of month value ... '" + arr_date[1] + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");
	return (dt_date); }

// parse time
function cal_prs_time (str_time, dt_date) {
	if (!dt_date) return null;
	var arr_time = String(str_time ? str_time : '').split(':');
	if (!arr_time[0]) dt_date.setHours(0);
	else if (RE_NUM.exec(arr_time[0])) 
		if (arr_time[0] < 24) dt_date.setHours(arr_time[0]);
		else return cal_error ("Invalid hours value ... '" + arr_time[0] + "'.\nAllowed range is 00-23.");
	else return cal_error ("Invalid hours value ... '" + arr_time[0] + "'.\nAllowed values are integers.");
	if (!arr_time[1]) dt_date.setMinutes(0);
	else if (RE_NUM.exec(arr_time[1]))
		if (arr_time[1] < 60) dt_date.setMinutes(arr_time[1]);
		else return cal_error ("Invalid minutes value ... '" + arr_time[1] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid minutes value ... '" + arr_time[1] + "'.\nAllowed values are integers.");
	if (!arr_time[2]) dt_date.setSeconds(0);
	else if (RE_NUM.exec(arr_time[2]))
		if (arr_time[2] < 60) dt_date.setSeconds(arr_time[2]);
		else return cal_error ("Invalid seconds value ... '" + arr_time[2] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid seconds value ... '" + arr_time[2] + "'.\nAllowed values are integers.");
	dt_date.setMilliseconds(0);
	return dt_date; }

function cal_error (str_message) {
	alert (str_message);
	return null; }