// 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) {
	// assigning 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 or found.");
	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,args) {
    var domain = document.domain;
    var calURL;
    var yrforw = 100;  //default. Navigating year forward
    var mnforw = 12;   //default. Navigating month forward
    var yrback = 100;  //default. Navigating year backward
    var mnback = 12;   //default. Navigating month backward
    var nofuturedate = 0; // default. No forward navigation, including date
	var mtype = TypeOf(args);
    if(args){ // -1 signals to use the default values above
      if(TypeOf(args) == 'string'){
		switch(args){
		  case 'nofuturedate':
			args = [0,0];
			nofuturedate = 1;
			break;
	      default:
			alert('Unrecognized argument string "' + args + '" in cal_popup2()\n' +
				  'See the documentation for PickDate2()');
			return false;
		}
	  }
	  var len = args.length;
	  if(len > 0 && args[0] > -1){
		yrforw = args[0];
		if(len > 1 && args[1] > -1){
		  mnforw = args[1];
		  if(len > 2 && args[2] > -1){
			yrback = args[2];
			if(len > 3 && args[3] > -1)
			  mnback = args[3]; }}}}
	this.dt_current = this.prs_tsmp(str_datetime ? str_datetime : this.target.value);
	if (!this.dt_current) return;
	if(domain == 'bart.johnson.com')
	  calURL = 'http://bart.johnson.com/js/';
	else if(domain == 'localhost') 
	  calURL = 'http://localhost/js/';
	else
	  calURL = 'http://' + domain + '/';
	var winURL = calURL + 'calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id
		+ '&yrback=' + yrback + '&yrforw=' + yrforw + '&mnforw=' + mnforw + '&mnback=' + mnback
		+ '&nofuturedate=' + nofuturedate;
	var obj_calwindow = window.open(winURL,
		'Calendar', 'width=300,height='+(this.time_comp ? 268 : 228)+
		',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.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 or empty string return current timestamp
  if (!str_datetime){
		return (new Date());
  }
  else{ // if a string
	var type = typeof(str_datetime);
	if(type.toUpperCase() == 'STRING' && StrEmpty(str_datetime))
	  return (new Date());
  }
//   if(StrEmpty(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.\nEnter manually.");
	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();
	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.\nEnter manually");
	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 PickDate2(formname,textfieldname,time_comp_status,year_scroll_status) {
	var time_comp_clearance_flag = 0;
	var year_scroll_clearance_flag = 0;
	
	var cal = new calendar2(document.forms[formname].elements[textfieldname]);
	if(time_comp_status == "need_time_stamp") {
		cal.time_comp = true;
		time_comp_clearance_flag = 1;
	}
	else if(time_comp_status=="dont_need_time_stamp") {
		cal.time_comp = false;
		time_comp_clearance_flag = 1;
	}
	else if(time_comp_clearance_flag == 0) {
	  alert("DO YOU NEED TIME STAMP FOR THE PARAMETER? \n" +
		    "IF YES:  specify the third parameter for the subroutine as -- \'need_time stamp\' \n" +
			"IF NO: specify the third parameter as -- \'dont_need_time_stamp\'");
	}
	if(year_scroll_status == "need_year_scroll") {
		cal.year_scroll = true;
		year_scroll_clearance_flag = 1;
	}
	else if(year_scroll_status=="dont_need_year_scroll") {
		cal.year_scroll = false;
		year_scroll_clearance_flag = 1;
	}
	else if(year_scroll_clearance_flag == 0) {
		alert("DO YOU NEED TIME STAMP FOR THE PARAMETER? \n" +
			  " IF YES:  specify the fourth parameter for the subroutine as -- \'need_year_scroll\' \n" +
			  " IF NO: specify the fourth parameter as -- \'dont_need_year_scroll\'");
	}
	if((time_comp_clearance_flag == 1)&&(year_scroll_clearance_flag == 1))
		cal.popup();
}
// ================================================================================================================
// Option 'args' can be an array with a maximum of 4 integers.
//    args[0]: Limit of years foward. args[1]: Limit of months forward.
//    args[2]: Limit of years backward. args[3]: Limit of months backward
//      use -1 to so that cal_popup2 will use default values.
//  OR: args can be a string: 
//      'nofuturedate': stop all forward navigation
// ================================================================================================================
function PickDate(formname,textfieldname,args){
    var time_comp_status = 'dont_need_time_stamp';
    var year_scroll_status = 'need_year_scroll';
	var time_comp_clearance_flag = 0;
	var year_scroll_clearance_flag = 0;
	var form = document.getElementById(formname); // Just checking
    // control is an HTMLInputElement
	var control = document.forms[formname].elements[textfieldname];
  	if(!control) // bad name, try ID
  	  control = document.getElementById(textfieldname);
	if(!control){
	  cal_error("No control found for text field name: " + textfieldname +
				".\nPossible cause: Incorrect field|form name|ID or\n" +
				"multiple forms with duplicate names|IDs.");
	}
	else{
		var cal = new calendar2(control);
		if(time_comp_status == "need_time_stamp"){
			cal.time_comp = true;
			time_comp_clearance_flag = 1;
			}
		else if(time_comp_status=="dont_need_time_stamp"){
			cal.time_comp = false;
			time_comp_clearance_flag = 1;
			}
		else if(time_comp_clearance_flag == 0){
			alert("DO YOU NEED TIME STAMP FOR THE PARAMETER? \n " +
				  "IF YES:  specify the third parameter for the subroutine as -- \'need_time stamp\' \n" +
				  " IF NO: specify the third parameter as -- \'dont_need_time_stamp\'");
			}
		if(year_scroll_status == "need_year_scroll"){
			cal.year_scroll = true;
			year_scroll_clearance_flag = 1;
			}
		else if(year_scroll_status=="dont_need_year_scroll"){
			cal.year_scroll = false;
			year_scroll_clearance_flag = 1;
			}
		else if(year_scroll_clearance_flag == 0){
			alert("DO YOU NEED TIME STAMP FOR THE PARAMETER? \n " +
				  "IF YES:  specify the fourth parameter for the subroutine as -- \'need_year_scroll\' \n" +
				  " IF NO: specify the fourth parameter as -- \'dont_need_year_scroll\'");
			}
		if((time_comp_clearance_flag == 1)&&(year_scroll_clearance_flag == 1)){
			cal.popup(null,args);
			}
		}
	}