// Title: Tigra Calendar
// URL: http://www.softcomplex.com/products/tigra_calendar/
// Version: 3.2 (European 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 calendar1(obj_target) {

  // assing 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 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_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(
    'calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
    'Calendar', 'width=500,height=500,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 ("Ungültiges Datumsformat: '" + str_date + "'.\nAkzeptiertes Format ist TT.MM.JJJJ.");
  if (!arr_date[0]) return cal_error ("Ungültiges Datumsformat: '" + str_date + "'.\nTag konnte nicht gefunden werden.");
  if (!RE_NUM.exec(arr_date[0])) return cal_error ("Ungültiger Monatstag: '" + arr_date[0] + "'.\nErlaubter Werte sind postive Ganzzahlen");
  if (!arr_date[1]) return cal_error ("Ungültiges Datumsformat: '" + str_date + "'.\nMonat konnte nicht gefunden werden.");
  if (!RE_NUM.exec(arr_date[1])) return cal_error ("Ungültiger Monat: '" + arr_date[1] + "'.\nErlaubter Werte sind postive Ganzzahlen");
  if (!arr_date[2]) return cal_error ("Ungültiges Datumsformat: '" + str_date + "'.\nJahr konnte nicht gefunden werden.");
  if (!RE_NUM.exec(arr_date[2])) return cal_error ("Ungültiges Jahr: '" + arr_date[2] + "'.\nErlaubter Werte sind postive Ganzzahlen");

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

  if (arr_date[1] < 1 || arr_date[1] > 12) return cal_error ("Ungültiger Monat: '" + arr_date[1] + "'.\nErlaubter Bereich: 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 ("Dieer Tag existiert nicht in diesem Monat: '" + arr_date[0] + "'.\nErlaubter Bereich: 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 ("Ungültige Stundenangabe: '" + arr_time[0] + "'.\nErlaubter Bereich ist 00-23.");
  else return cal_error ("Ungültige Stundenangabe: '" + arr_time[0] + "'.\nErlaubter Werte sind postive Ganzzahlen");

  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 ("Ungültige Minutenangabe: '" + arr_time[1] + "'.\nErlaubter Bereich ist 00-59.");
  else return cal_error ("Ungültige Minutenangabe: '" + arr_time[1] + "'.\nErlaubter Werte sind postive Ganzzahlen");

  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 ("Ungültige Sekundenangabe: '" + arr_time[2] + "'.\nErlaubter Bereich ist 00-59.");
  else return cal_error ("Ungültige Sekundenangabe: '" + arr_time[2] + "'.\nErlaubter Werte sind postive Ganzzahlen");

  dt_date.setMilliseconds(0);
  return dt_date;
}

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

/***************************************************************************
 * Changes date of given calendar
 * retrieves current calendar block based on calendar object and specified
 * text. Result maybe used to print as html output
 *
 *   caller:        *name of* calendar object
 *   n_datetime:    new timestamp
 *  [st_current:    current date (as string TT.MM.JJJJ)]
 *
 * returns HTML string
 **************************************************************************/

function set_datetime(caller, n_datetime,st_current) {
  var obj_caller = eval (caller);
  
  if (n_datetime == '') {
    st_current = st_current.replace(/(\d*)\.(\d*)\.(\d*)/,"$2/$1/$3");
    n_datetime = new Date(st_current).valueOf();
  }

  if (!obj_caller) return;

  var dt_datetime = obj_caller.prs_time(
    (document.cal ? document.cal.time.value : ''),
    new Date(n_datetime)
  );

  // 2do: refresh object
  obj_caller.target.value = (document.cal
      ? obj_caller.gen_tsmp(dt_datetime)
      : obj_caller.gen_date(dt_datetime)
    );

  document.getElementById('cal_'+caller).innerHTML=GetCalendarText(caller,new Date(n_datetime));
  
  // customized for ebooking
  if (caller=='anreise') set_datetime('abreise',n_datetime+24*60*60*1000);
}

/***************************************************************************
 * GetCalendarText
 * retrieves current calendar block based on calendar object and specified
 * text. Result maybe used to print as html output
 *
 *   caller:        *name of* calendar object
 *   dt_current:    current date (Date() object)
 *  [st_current:    current date (as string TT.MM.JJJJ)]
 *
 * returns HTML string
 **************************************************************************/

function GetCalendarText(caller,dt_current,st_current) {
  var obj_caller = eval(caller);
  if (dt_current == '') {
    st_current = st_current.replace(/(\d*)\.(\d*)\.(\d*)/,"$2/$1/$3");
    dt_current = new Date(st_current);
  }

  if (obj_caller && obj_caller.year_scroll) {
    // get same date in the previous year
    var dt_prev_year = new Date(dt_current);
    dt_prev_year.setFullYear(dt_prev_year.getFullYear() - 1);
    if (dt_prev_year.getDate() != dt_current.getDate())
      dt_prev_year.setDate(0);

    // get same date in the next year
    var dt_next_year = new Date(dt_current);
    dt_next_year.setFullYear(dt_next_year.getFullYear() + 1);
    if (dt_next_year.getDate() != dt_current.getDate())
      dt_next_year.setDate(0);
  }

  // get same date in the previous month
  var dt_prev_month = new Date(dt_current);
  dt_prev_month.setMonth(dt_prev_month.getMonth() - 1);
  if (dt_prev_month.getDate() != dt_current.getDate())
    dt_prev_month.setDate(0);

  // get same date in the next month
  var dt_next_month = new Date(dt_current);
  dt_next_month.setMonth(dt_next_month.getMonth() + 1);
  if (dt_next_month.getDate() != dt_current.getDate())
    dt_next_month.setDate(0);

  // get first day to display in the grid for current month
  var dt_firstday = new Date(dt_current);
  dt_firstday.setDate(1);
  dt_firstday.setDate(1 - (7 + dt_firstday.getDay() - NUM_WEEKSTART) % 7);

  var result;
  result  = '<table cellspacing="0" cellpadding="0" border="0" width="195">';
  result += '<tr><td>';
  result += '<table cellspacing="0" cellpadding="0" border="0" width="100%">';
  result += '<tr><td colspan="9"><table cellspacing="0" cellpadding="0" border="0" width="100%">';
  result += '<tr>';
  result += '<td><a href="javascript:set_datetime(\''+caller+'\','+dt_prev_month.valueOf()+')"><img src="/images/kal-prev.gif" width="31" height="32" border="0" alt="Vorheriger Monat"></a></td>';
  result += '<td background="/images/kal-hd.gif" align="center" width="100%">'+ARR_MONTHS[dt_current.getMonth()]+' '+dt_current.getFullYear() + '</td>';
  result += '<td><a href="javascript:set_datetime(\''+caller+'\','+dt_next_month.valueOf()+')"><img src="/images/kal-next.gif" width="31" height="32" border="0" alt="Nächster Monat"></a></td>';
  result += '</tr>';
  result += '</table></td></tr>';
  result += '<tr><td colspan="9" background="/images/kal-o.gif"><img src="/images/pixel.gif" width="195" height="3"></td></tr>';
  result += '<tr><td background="/images/kal-l.gif"><img src="/images/pixel.gif" width="3" height="27"></td>';

  // print weekdays titles
  for (var n=0; n<7; n++)
    result += '<td align="center" background="/images/kal-fd.gif" width="27" height="27">'+ARR_WEEKDAYS[(NUM_WEEKSTART+n)%7]+'</td>';
  result += '<td background="/images/kal-r.gif"><img src="/images/pixel.gif" width="3" height="27"></td></tr>';

  // print calendar table
  var dt_current_day = new Date(dt_firstday);
  var b,b_,img;
  while (dt_current_day.getMonth() == dt_current.getMonth() ||
    dt_current_day.getMonth() == dt_firstday.getMonth()) {
    // print row heder
    result+='<tr><td background="/images/kal-l.gif"><img src="/images/pixel.gif" width="3" height="27"></td>';


    for (var n_current_wday=0; n_current_wday<7; n_current_wday++) {

      if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6) img = '/images/kal-fd.gif';
      else                                                              img = '/images/kal-f.gif';

      if (dt_current_day.getMonth() == dt_current.getMonth() &&
          dt_current_day.getDate() == dt_current.getDate()) {
        b='<b>';b_='</b>';
        img = '/images/kal-fb.gif';
        current = 1;
      } else {
        b='';b_='';
        current=0;
      }


      if (dt_current_day.getDay() == 0 || dt_current_day.getDay() == 6)
        // weekend days
        result+='<td align="center" background="'+img+'" width="27" height="27" onClick="set_datetime(\''+caller+'\','+dt_current_day.valueOf() +', true);">';
      else
        // print working days of current month
        result+='<td align="center" background="'+img+'" width="27" height="27" onClick="set_datetime(\''+caller+'\','+dt_current_day.valueOf() +', true);">';

      result+='<a href="javascript:set_datetime(\''+caller+'\','+dt_current_day.valueOf() +', true);">';


      if (dt_current_day.getMonth() == dt_current.getMonth()) {
        // print days of current month

        if (dt_current_day.getDate() == dt_current.getDate()) {

          result+='<font color="#000000">';
        } else {
          result+='<font color="#000000">';
        }

      } else
        // print days of other months
        result+='<font color="#B0B0B0">';

      result += b+dt_current_day.getDate()+b_+'</font></a></td>';
      dt_current_day.setDate(dt_current_day.getDate()+1);
    }
    // print row footer
    result+='<td background="/images/kal-r.gif"><img src="/images/pixel.gif" width="3" height="27"></td></tr>';
  }
  /*use??
  if (obj_caller && obj_caller.time_comp)
    result+='<form onsubmit="javascript:set_datetime((\''+caller+'\','+dt_current.valueOf()+', true)" name="cal"><tr><td colspan="7" bgcolor="#87CEFA"><font color="White" face="tahoma, verdana" size="2">Time: <input type="text" name="time" value="'+obj_caller.gen_time(this.dt_current)+'" size="8" maxlength="8"></font></td></tr></form>';*/

  result += '<tr><td colspan="9" background="/images/kal-u.gif"><img src="/images/pixel.gif" width="195" height="3"></td></tr>';
  result += '</table></td></tr>';
  result += '</table>';
//alert(result);
  return result;
}

/**
 * DHTML date validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// Declaring valid date character, minimum year and maximum year
var dtCh= ".";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   }
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("Das Datumsformat sollte: TT.MM.JJJJ sein")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Bitte geben sie einen gültigen Monat ein")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Bitte geben sie einen gültigen Tag ein")
		return false
	}
	if (strYear.length ==2) {
	  strYear = "20"+strYear;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Bitte benutzen sie eine 2- oder 4-stellige Jahresangabe zwischen "+minYear+" und "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Bitte geben sie ein gültiges Datum ein")
		return false
	}
  return true
}