/*
	Title: Tigra Calendar
	URL: http://www.softcomplex.com/products/tigra_calendar/
	Version: 3.2 (American date format)
	Date: 10/14/2002 (mm/dd/yyyy)
	Feedback: feedback@softcomplex.com (specify product title in the subject)
	Note: Permission given to use this script in ANY kind of applications if
	header lines are left unchanged.
	Note: Script consists of two files: calendar?.js and calendar.html
	About us: Our company provides offshore IT consulting services.
	Contact us at sales@softcomplex.com if you have any programming task you
	want to be handled by professionals. Our typical hourly rate is $20.
*/

// 	if two digit year input dates after this year considered 20 century.
var NUM_CENTYEAR = 30;
// 	is time input control required by default
var BUL_TIMECOMPONENT = false;
// 	are year scrolling buttons required by default
var BUL_YEARSCROLL = true;

var calendars = [];
var RE_NUM = /^\-?\d+$/;

function calendar2(obj_target) {

	//	 assing methods
	this.gen_date = cal_gen_date2;
	this.gen_time = cal_gen_time2;
	this.gen_tsmp = cal_gen_tsmp2;
	this.prs_date = cal_prs_date2;
	this.prs_time = cal_prs_time2;
	this.prs_tsmp = cal_prs_tsmp2;
	this.popup    = cal_popup2;

	// 	validate input parameters
	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;

	// 	register in global collections
	this.id = calendars.length;
	calendars[this.id] = this;
}

function cal_popup2 (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(
	'/admin/calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
	'Calendar', 'width=215,height='+(this.time_comp ? 225 : 190)+
	',status=no,resizable=no,top=200,left=200,dependent=yes,alwaysRaised=yes'
	);
	obj_calwindow.opener = window;
	obj_calwindow.focus();
}

// 	timestamp generating function
function cal_gen_tsmp2 (dt_datetime) {
	return(this.gen_date(dt_datetime) + ' ' + this.gen_time(dt_datetime));
}

// 	date generating function
function cal_gen_date2 (dt_datetime) {
	return (
	dt_datetime.getFullYear() + "-"
	+ (dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
	+ (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate()
	);
}
//	 time generating function
function cal_gen_time2 (dt_datetime) {
	return (
	(dt_datetime.getHours() < 10 ? '0' : '') + dt_datetime.getHours() + ":"
	+ (dt_datetime.getMinutes() < 10 ? '0' : '') + (dt_datetime.getMinutes())
	);
}

// 	timestamp parsing function
function cal_prs_tsmp2 (str_datetime) {
	//	 if no parameter specified return current timestamp
	if (!str_datetime)
	return (new Date());

	// 	if positive integer treat as milliseconds from epoch
	if (RE_NUM.exec(str_datetime))
	return new Date(str_datetime);

	// 	else treat as date in string format
	var arr_datetime = str_datetime.split(' ');
	return this.prs_time(arr_datetime[1], this.prs_date(arr_datetime[0]));
}

// 	date parsing function
function cal_prs_date2 (str_date) {

	var arr_date = str_date.split('-');

	if (arr_date.length != 3) return alert ("Invalid date format: '" + str_date + "'.\nFormat accepted is yyyy-mm-dd.");
	if (!arr_date[2]) return alert ("Invalid date format: '" + str_date + "'.\nNo day of month value can be found.");
	if (!RE_NUM.exec(arr_date[2])) return alert ("Invalid day of month value: '" + arr_date[2] + "'.\nAllowed values are unsigned integers.");
	if (!arr_date[1]) return alert ("Invalid date format: '" + str_date + "'.\nNo month value can be found.");
	if (!RE_NUM.exec(arr_date[1])) return alert ("Invalid month value: '" + arr_date[1] + "'.\nAllowed values are unsigned integers.");
	if (!arr_date[0]) return alert ("Invalid date format: '" + str_date + "'.\nNo year value can be found.");
	if (!RE_NUM.exec(arr_date[0])) return alert ("Invalid year value: '" + arr_date[0] + "'.\nAllowed values are unsigned integers.");

	var dt_date = new Date();
	dt_date.setDate(1);

	if (arr_date[1] < 1 || arr_date[1] > 12) return alert ("Invalid month value: '" + arr_date[1] + "'.\nAllowed range is 01-12.");
	dt_date.setMonth(arr_date[1]-1);

	if (arr_date[0] < 100) arr_date[0] = Number(arr_date[0]) + (arr_date[0] < NUM_CENTYEAR ? 2000 : 1900);
	dt_date.setFullYear(arr_date[0]);

	var dt_numdays = new Date(arr_date[1], arr_date[2], 0);
	dt_date.setDate(arr_date[2]);
	if (dt_date.getMonth() != (arr_date[1]-1)) return alert ("Invalid day of month value: '" + arr_date[2] + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");

	return (dt_date)
}

//	 time parsing function
function cal_prs_time2 (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 unsigned 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 unsigned 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 unsigned integers.");

	dt_date.setMilliseconds(0);
	return dt_date;
}

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