//======================================================================================================
//======================================================================================================

// Title: Tigra Calendar
// URL: http://www.softcomplex.com/products/tigra_calendar/
// Version: 3.2 (European date format)
// Date: 10/14/2002 (mm/dd/yyyy)
// 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

// 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 calendar1(obj_target, tmp_target) {

		 // assigning methods
		 this.gen_date = cal_gen_date1;
		 this.gen_time = cal_gen_time1;
		 this.gen_tsmp = cal_gen_tsmp1;
		 this.prs_date = cal_prs_date1;
		 this.prs_time = cal_prs_time1;
		 this.prs_tsmp = cal_prs_tsmp1;
		 this.popup    = cal_popup1;

		 // 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.txt_target = tmp_target;   // added by Alex :)
		 this.time_comp = BUL_TIMECOMPONENT;
		 this.year_scroll = BUL_YEARSCROLL;
		 
		 // register in global collections
		 this.id = calendars.length;
		 calendars[this.id] = this;
}

function cal_popup1 (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(
		 		 this.path+'calendar/calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
		 		 'Calendar', 'width=200,height='+(this.time_comp ? 165 : 165)+
		 		 ',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_tsmp1 (dt_datetime) {
		 return(this.gen_date(dt_datetime) + ' ' + this.gen_time(dt_datetime));
}

// date generating function
function cal_gen_date1 (dt_datetime) {
		 return (
		 		 (dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "-"
		 		 + (dt_datetime.getMonth() < 9 ? '0' : '') + (dt_datetime.getMonth() + 1) + "-"
		 		 + dt_datetime.getFullYear()
		 );
}
// time generating function
function cal_gen_time1 (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_tsmp1 (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_date1 (str_date) {

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

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

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

		 if (arr_date[1] < 1 || arr_date[1] > 12) return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed range is 01-12.");
		 dt_date.setMonth(arr_date[1]-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[1], 0);
		 dt_date.setDate(arr_date[0]);
		 if (dt_date.getMonth() != (arr_date[1]-1)) return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");

		 return (dt_date)
}

// time parsing function
function cal_prs_time1 (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;
}