var defaultDisplaytype = 'dmy';
// ---------------------------------------------

// Title: Tigra Calendar
// Description: See the demo at url
// URL: http://www.softcomplex.com/products/tigra_calendar/
// Version: 3.0 (Date only with year scrolling)
// Date: 06-20-2002 (mm-dd-yyyy)
// Author: Denis Gritcyuk <denis@softcomplex.com>
// 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 tardet 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(
		'calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
		'Calendar', 'width=200,height='+(this.time_comp ? 215 : 205)+
		',status=no,resizable=no,top=170,left=700,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.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "/"
		+ (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "/"
		+ dt_datetime.getFullYear()
	);
}
//--------------------------------------------------------------------------
// 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()) + ":"
		+ (dt_datetime.getSeconds() < 10 ? '0' : '') + (dt_datetime.getSeconds())
	);
}
//--------------------------------------------------------------------------
// 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 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 unsigned 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 unsigned 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 unsigned integers.");

	var dt_date = new Date();

	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)
}
//--------------------------------------------------------------------------
// 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;
}
//--------------------------------------------------------------------------
//function showCalendar(formName, inputName) {
function showCalendar(inputName) {
	var tmpObj, dpType;
	
	if (arguments.length >= 3) dpType = arguments[2]; else dpType = defaultDisplaytype;
	
	
	//tmpObj = new createTextObject(document.forms[formName].elements[inputName], dpType);
	tmpObj = new createTextObject(document.forms[0].elements[inputName], dpType);

	var cal1;
	//cal1 = new calendar2(document.forms[formName].elements[inputName]);
	cal1 = new calendar2(tmpObj);

	cal1.year_scroll = true;
	cal1.time_comp = false;
	cal1.popup();
}
//--------------------------------------------------------------------------
function createTextObject(tf, displayType) {
	var dateValue;
	if (tf !=null) dateValue = changeDisplayFormat(tf.value, displayType, true);
	this.target = tf;
	this.value = dateValue;
	this.displayType = displayType;
}

function assignToTextObject(textObject) {
	if (textObject !=null) {
		if (textObject.target != null) {
			textObject.target.value = changeDisplayFormat(textObject.value, textObject.displayType, false);
		}
	}
}

function changeDisplayFormat(dateValue, displayType, isToStandart) {
	var m_arr = dateValue.split(" ");
	var dateValue = m_arr[0];
	var sep = "/";
	if (dateValue.indexOf("-")>0) sep = "-";
	var arr = dateValue.split(sep);
	if (arr.length == 3) {
		var tmp;
		if (isToStandart) {
			//Change to standard format - mm/dd/yyyy
			if (displayType=="dmy") {
				tmp = arr[0];
				arr[0] = arr[1];
				arr[1] = tmp;
			}
			else if (datetype=="ymd") {
				tmp = arr[0];
				arr[0] = arr[1];
				arr[1] = arr[2];
				arr[2] = tmp;
			}
			else {	//mm/dd/yyyy, it is standard.
				;
			}
		} else {
			//Change to displayType from standart format
			if (displayType=="dmy") {
				tmp = arr[0];
				arr[0] = arr[1];
				arr[1] = tmp;
			}
			else if (datetype=="ymd") {
				tmp = arr[0];
				arr[0] = arr[2];
				arr[2] = arr[1];
				arr[1] = tmp;
			}
			else {	//mm/dd/yyyy, it is standard.
				;
			}
		}
		dateValue = arr[0] + '/' + arr[1] + '/' + arr[2];
	}
	m_arr[0] = dateValue;
	for (var i = 0; i < m_arr.length; i++) {
		if (i == 0) dateValue = m_arr[i];
		else dateValue = dateValue + ' ' + m_arr[i];
	}
	return dateValue;
}
//------------------------------