/***********************************************
 Fool-Proof Date Input Script with DHTML Calendar
 by Jason Moon - http://calendar.moonscript.com/dateinput.cfm
 ************************************************/

// Enhanced by K.Heermann (flip-flop) 30.10.09  e.g. DD.MM.YYYY
// V1.1 03.11.09  + Week number  (Kalednerwoche) an some cutom vars
// -------------------------------------------------------------

// Customizable variables =====================================================

var lang_de     = 1;                  // +KH: Language German 0=[Month][Day][Year] and German Text    1=[Day][Month][Year] and English text
var myStartDay  = 1;                  // +KH: Calendar start day- default: Sunday = 0 | Monday = 1
var myWeekNo    = 0;                  // +KH: Calendar week No: Off= 0 | On = 1

var DefaultDateFormat   = 'DD.MM.YYYY'; // +KH: If no date format is supplied, this will be used instead
var HideWait            = 2;            // Number of seconds before the calendar will disappear
var Y2kPivotPoint       = 76;           // 2-digit years before this point will be created in the 21st century
var UnselectedMonthText = '';           // Text to display in the 1st month list item when the date isn't required

var spacer        = 'img/leer.gif';   // gif transp. , important

// Calender Head
var ImageURL      = 'site/img/calendar.jpg';  // Calendar image
var NextURL       = 'site/img/next.gif';         // Next image
var PrevURL       = 'site/img/prev.gif';         // Prev image

var TopRowBGColor = '#d4d0c8';                     // bg Head
var CalHeadTxt    = 'Zeige aktuellen Monat';




// Calendar grid
var DayBGColor          = '#aaa';            // hover
var CalBGColor          = '#f0f0f0';            // grid
var DaySelectTextColor  = 'color:white;font-weight:bold;';
var DaySelectTextStyle  = 'border:1px solid darkred; padding:0px;';
var DayTextColor        = 'color:black;';
var FontSize            = 12;               // Calendar grid [px]
var FontFamily          = 'Tahoma';
var CalendarGridTd      = 'letter-spacing:normal;line-height:normal;font-family:' + FontFamily + ',Sans-Serif;font-size:' + FontSize + 'px;';

// Calendar pull down 
var CalendarPullDownSelect = 'letter-spacing:.06em; font-family:Verdana,Sans-Serif; font-size:12px;';
var CalendarPullDownInput  = 'letter-spacing:.06em; font-family:Verdana,Sans-Serif; font-size:12px;';

var CellWidth        = 25;            // Cell width of Day No Cell
var WeekNoCellWidth  = 30;            // +KH: Cell width of Calendar week if available
var CellHeight       = 18;            // Height of all cells

var WeekNoCellBorder = 'border-right:1px solid #ccc;color:#666;background:#f5f5f5;';     // Style for week Number



var ClickToSelectTxt = 'Klick für die Anzeige des ';
// var ClickToSelectTxt = 'Click to select today';

var ClickToViewTxt  = 'Klick: Anzeige des ';
// var ClickToViewTxt  = 'Click to view ';

var ClickTxt  = 'Klick: ';
// var ClickToViewTxt  = 'Click: ';

var CalHideTxt = 'Kalender verstecken'; 
// var CalHideTxt = 'Hide Calendar';

var CalShowTxt = 'Kalender anzeigen';
// var CalShowTxt = 'Show Calendar';


var TodayTxt = 'heutigen Tag';
// var TodayTxt = 'today';

if (myStartDay) var WeekDays = new Array('Mo','Di','Mi','Do','Fr','Sa','So');
else            var WeekDays = new Array('So','Mo','Di','Mi','Do','Fr','Sa');

if (lang_de) var myWeekNoTxt = 'KW';                // Calendar week
else         var myWeekNoTxt = 'CW';

if (lang_de) var MonthNames = new Array('Januar','Februar','März','April','Mai','Juni','Juli','August','September','Oktober','November','Dezember');
else         var MonthNames = new Array('January','February','March','April','May','June','July','August','September','October','November','December');

// Customizable variables ====END==============================================


// Global variables
var ZCounter = 100;
var Today = new Date();
var MonthDays = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

var eol = String.fromCharCode(13);

if (myStartDay > 0)   // +KH: Calendar start day- default: Sunday = 0 | Monday = 1
     myStartDay   = 1; 
else myStartDay   = 0;


var myCellCount = 7; // +KH: CellCount for the right output 
if (myWeekNo > 0) {  // +KH: WeekNumber Off= 0 | On = 1
    myWeekNo    = 1;
    myCellCount = 8; 
} else WeekNoCellWidth = 0;    // +Kh: Reset WeekNumber cell width


// Write out the stylesheet definition for the calendar 
with (document) {
   writeln('<style>');
   writeln('td.calendarDateInput {'+ CalendarGridTd + '}');
   writeln('select.calendarDateInput {' + CalendarPullDownSelect + '}');
   writeln('input.calendarDateInput  {' + CalendarPullDownInput + '}');
   writeln('</style>');
}



// Only allows certain keys to be used in the date field
function YearDigitsOnly(e) {
   var KeyCode = (e.keyCode) ? e.keyCode : e.which;
   return ((KeyCode == 8) // backspace
        || (KeyCode == 9) // tab
        || (KeyCode == 37) // left arrow
        || (KeyCode == 39) // right arrow
        || (KeyCode == 46) // delete
        || ((KeyCode > 47) && (KeyCode < 58)) // 0 - 9
   );
}

// Gets the absolute pixel position of the supplied element
function GetTagPixels(StartTag, Direction) {
   var PixelAmt = (Direction == 'LEFT') ? StartTag.offsetLeft : StartTag.offsetTop;
   while ((StartTag.tagName != 'BODY') && (StartTag.tagName != 'HTML')) {
      StartTag = StartTag.offsetParent;
      PixelAmt += (Direction == 'LEFT') ? StartTag.offsetLeft : StartTag.offsetTop;
   }
   return PixelAmt;
}

// Is the specified select-list behind the calendar?
function BehindCal(SelectList, CalLeftX, CalRightX, CalTopY, CalBottomY, ListTopY) {
   var ListLeftX = GetTagPixels(SelectList, 'LEFT');
   var ListRightX = ListLeftX + SelectList.offsetWidth;
   var ListBottomY = ListTopY + SelectList.offsetHeight;
   return (((ListTopY < CalBottomY) && (ListBottomY > CalTopY)) && ((ListLeftX < CalRightX) && (ListRightX > CalLeftX)));
}

// For IE, hides any select-lists that are behind the calendar
function FixSelectLists(Over) {
   if (navigator.appName == 'Microsoft Internet Explorer') {
      var CalDiv = this.getCalendar();
      var CalLeftX = CalDiv.offsetLeft;
      var CalRightX = CalLeftX + CalDiv.offsetWidth;
      var CalTopY = CalDiv.offsetTop;
      var CalBottomY = CalTopY + (CellHeight * 9);
      var FoundCalInput = false;
      formLoop :
      for (var j=this.formNumber;j<document.forms.length;j++) {
         for (var i=0;i<document.forms[j].elements.length;i++) {
            if (typeof document.forms[j].elements[i].type == 'string') {
               if ((document.forms[j].elements[i].type == 'hidden') && (document.forms[j].elements[i].name == this.hiddenFieldName)) {
                  FoundCalInput = true;
                  i += 3; // 3 elements between the 1st hidden field and the last year input field
               }
               if (FoundCalInput) {
                  if (document.forms[j].elements[i].type.substr(0,6) == 'select') {
                     ListTopY = GetTagPixels(document.forms[j].elements[i], 'TOP');
                     if (ListTopY < CalBottomY) {
                        if (BehindCal(document.forms[j].elements[i], CalLeftX, CalRightX, CalTopY, CalBottomY, ListTopY)) {
                           document.forms[j].elements[i].style.visibility = (Over) ? 'hidden' : 'visible';
                        }
                     }
                     else break formLoop;
                  }
               }
            }
         }
      }
   }
}

// Displays a message in the status bar when hovering over the calendar days
function DayCellHover(Cell, Over, Color, HoveredDay) {
   Cell.style.backgroundColor = (Over) ? DayBGColor : Color;
   if (Over) {
      if ((this.yearValue == Today.getFullYear()) && (this.monthIndex == Today.getMonth()) && (HoveredDay == Today.getDate())) self.status = ClickToSelectTxt + TodayTxt;
      else {
         var Suffix = HoveredDay.toString();
         
         
            switch (Suffix.substr(Suffix.length - 1, 1)) {
               case '1' : Suffix += (HoveredDay == 11) ? 'th' : 'st'; break;
               case '2' : Suffix += (HoveredDay == 12) ? 'th' : 'nd'; break;
               case '3' : Suffix += (HoveredDay == 13) ? 'th' : 'rd'; break;
               default : Suffix += 'th'; break;
            }
            if (lang_de > 0) Suffix = '';  // No suffix
            
            self.status = ClickToSelectTxt + this.monthName + ' ' + Suffix;
      }
   }
   else self.status = '';
   return true;
}

// Sets the form elements after a day has been picked from the calendar
function PickDisplayDay(ClickedDay) {
   this.show();
   var MonthList = this.getMonthList();
   var DayList = this.getDayList();
   var YearField = this.getYearField();
   FixDayList(DayList, GetDayCount(this.displayed.yearValue, this.displayed.monthIndex));
   // Select the month and day in the lists
   for (var i=0;i<MonthList.length;i++) {
      if (MonthList.options[i].value == this.displayed.monthIndex) MonthList.options[i].selected = true;
   }
   for (var j=1;j<=DayList.length;j++) {
      if (j == ClickedDay) DayList.options[j-1].selected = true;
   }
   this.setPicked(this.displayed.yearValue, this.displayed.monthIndex, ClickedDay);
   // Change the year, if necessary
   YearField.value = this.picked.yearPad;
   YearField.defaultValue = YearField.value;
}

/* ====================================== */
// http://www.salesianer.de/util/kalwoch.html
// DIN 1355 / ISO 8601  -> http://de.wikipedia.org/wiki/Woche

function kalenderwoche(jahr,monat,tag) {
    Datum=new Date(jahr,monat-1,tag); // Anm. 1
    DoDat=donnerstag(Datum);
    kwjahr=DoDat.getFullYear();
    DoKW1=donnerstag(new Date(kwjahr,0,4)); // Anm. 2
    kw=Math.floor(1.5+(DoDat.getTime()-DoKW1.getTime())/86400000/7) // Anm. 3, 4
  return kw;
}

function donnerstag(datum) { // Anm. 5
    var Do=new Date();
    Do.setTime(datum.getTime() + (3-((datum.getDay()+6) % 7)) * 86400000); // Anm. 3
  return Do;
}
/* ====================================== */



// Builds the HTML for the calendar days
function BuildCalendarDays() {
  var TextStyle = '';
  var BackColor = '';
  var Day = 0;
  var Rows = 5;
  
  if (((this.displayed.dayCount == 31) && (this.displayed.firstDay > 4)) || ((this.displayed.dayCount == 30) && (this.displayed.firstDay == 6))) Rows = 6;
  else if ((this.displayed.dayCount == 28) && (this.displayed.firstDay == 0)) Rows = 4;

  var HTML = '<table width="' + ( (CellWidth * 7)+ 14 + WeekNoCellWidth +2 ) + '" cellspacing="0" cellpadding="0" style="cursor:default">';  // +KH

    var weeknr = kalenderwoche(this.displayed.yearValue,this.displayed.monthIndex+1,1); // KalenderWoche(j,m,t)
    
    
    // English/US version of week number ?????? 
    if (myWeekNo > 0 && lang_de < 1) {  // Show Week number and Sunday the first day in week

       var tempMonthCnt = this.displayed.monthIndex;
       switch (tempMonthCnt) {
         case 0:  var weeknr =  1; break;
         case 1:  var weeknr =  5; break;
         case 2:  var weeknr =  9; break;
         case 3:  var weeknr = 14; break;
         case 4:  var weeknr = 18; break;
         case 5:  var weeknr = 22; break;
         case 6:  var weeknr = 27; break;
         case 7:  var weeknr = 31; break;
         case 8:  var weeknr = 35; break;
         case 9:  var weeknr = 39; break;
         case 10: var weeknr = 43; break;
         case 11: var weeknr = 47; break;
         default: var weeknr =  1; break;
      }
    }

for (var j=0;j<Rows;j++) {
      HTML += '<tr>';
      
      // German version Kalenderwoche ==========
      if (myWeekNo > 0 && myStartDay > 0 && lang_de > 0) {  // Show Week number and Monday the first day in week
         
         if (weeknr > 53) weeknr = 1;
         
         if (this.displayed.monthIndex == 11 && this.displayed.firstDay < 1 && weeknr > 52) weeknr = 1;  // December CW53 -> CW1
         if (this.displayed.monthIndex == 11 && this.displayed.firstDay > 4 && weeknr > 52) weeknr = 1;  // December CW53 -> CW1
         if (this.displayed.monthIndex ==  0 && this.displayed.firstDay < 4 && weeknr > 51) weeknr = 1;  // Januar and First day 
         
         HTML += '<td class="calendarDateInput" align="center" height="' + CellHeight 
              + '" width="' + (WeekNoCellWidth) 
              + '" style="'+WeekNoCellBorder+'">'+ weeknr + '</td>';  // +KH: Show WeekNo ?
         
         if (this.displayed.monthIndex == 0 && weeknr > 51) weeknr = 0;   // januar
      }
      //  ===END=================
      
      
      // English/US version of week number????? ==========
      if (myWeekNo > 0 && lang_de < 1) {  // Show Week number and Sunday the first day in week

         if (weeknr > 53) weeknr = 1;
         
         if (this.displayed.monthIndex == 11 && this.displayed.firstDay < 1 && weeknr > 52) weeknr = 1;  // December CW53 -> CW1
         if (this.displayed.monthIndex == 11 && this.displayed.firstDay > 4 && weeknr > 52) weeknr = 1;  // December CW53 -> CW1
         if (this.displayed.monthIndex ==  0 && this.displayed.firstDay < 4 && weeknr > 51) weeknr = 1;  // Januar and First day 
         
         HTML += '<td class="calendarDateInput" align="center" height="' + CellHeight 
              + '" width="' + (WeekNoCellWidth) 
              + '" style="'+WeekNoCellBorder+'">'+ weeknr + '</td>';  // +KH: Show WeekNo ?
         
         if (this.displayed.monthIndex == 0 && weeknr > 51) weeknr = 0;   // januar
      }
      //  ===END=================

      
      // Grid output ==========
      for (var i=1;i<=7;i++) {
          Day = (j * 7) + (i - this.displayed.firstDay);
          if ((Day >= 1) && (Day <= this.displayed.dayCount)) {
              if ((this.displayed.yearValue == this.picked.yearValue) 
              && (this.displayed.monthIndex == this.picked.monthIndex) && (Day == this.picked.day)) {
                  TextStyle = DaySelectTextColor;
                  BackColor = DayBGColor;
              }
              else {
                  TextStyle = DayTextColor;
                  BackColor = CalBGColor; 
              }
              if ((this.displayed.yearValue == Today.getFullYear()) 
              && (this.displayed.monthIndex == Today.getMonth()) 
              && (Day == Today.getDate())) TextStyle += DaySelectTextStyle;

              HTML += '<td align="center" class="calendarDateInput" style="cursor:default;height:' 
              + CellHeight + ';width:' + CellWidth + ';' + TextStyle + ';background-color:' + BackColor
              + '" onClick="' + this.objName + '.pickDay(' + Day + ')" onMouseOver="return ' 
              + this.objName + '.displayed.dayHover(this,true,\'' + BackColor + '\',' + Day + ')" onMouseOut="return ' 
              + this.objName + '.displayed.dayHover(this,false,\'' + BackColor + '\')">' + Day + '</td>';
              
          }
          else HTML += '<td class="calendarDateInput" style="height:' + CellHeight + '">&nbsp;</td>';

      }
      weeknr++;
      
      HTML += '</tr>';
      
         // Cell width fix using transp. images (yes is it an very old technic, but it works)
         HTML += '<tr>';
         // CW cell 
         if (myWeekNo > 0) HTML +='<td height="1" style="'+WeekNoCellBorder+'"><img src="'+spacer+'" vspace="0" hspace="0" border="0" width="' + WeekNoCellWidth + '" height="1" /></td>';
         // Day cell 
         for (var w=0;w<7;w++) HTML +='<td height="1"><img src="'+spacer+'" vspace="0" hspace="0" border="0" width="' + CellWidth + '" height="1" /></td>';
         HTML += '</tr>';
}
return HTML += '</table>';
}



// Determines which century to use (20th or 21st) when dealing with 2-digit years
function GetGoodYear(YearDigits) {
   if (YearDigits.length == 4) return YearDigits;
   else {
      var Millennium = (YearDigits < Y2kPivotPoint) ? 2000 : 1900;
      return Millennium + parseInt(YearDigits,10);
   }
}

// Returns the number of days in a month (handles leap-years)
function GetDayCount(SomeYear, SomeMonth) {
   return ((SomeMonth == 1) && ((SomeYear % 400 == 0) || ((SomeYear % 4 == 0) && (SomeYear % 100 != 0)))) ? 29 : MonthDays[SomeMonth];
}

// Highlights the buttons
function VirtualButton(Cell, ButtonDown) {
   if (ButtonDown) {
      Cell.style.borderLeft = 'buttonshadow 1px solid';
      Cell.style.borderTop = 'buttonshadow 1px solid';
      Cell.style.borderBottom = 'buttonhighlight 1px solid';
      Cell.style.borderRight = 'buttonhighlight 1px solid';
   }
   else {
      Cell.style.borderLeft = 'buttonhighlight 1px solid';
      Cell.style.borderTop = 'buttonhighlight 1px solid';
      Cell.style.borderBottom = 'buttonshadow 1px solid';
      Cell.style.borderRight = 'buttonshadow 1px solid';
   }
}

// Mouse-over for the previous/next month buttons
function NeighborHover(Cell, Over, DateObj) {
   if (Over) {
      VirtualButton(Cell, false);
      self.status = ClickToViewTxt + DateObj.fullName;
   }
   else {
      Cell.style.border = 'buttonface 1px solid';
      self.status = '';
   }
   return true;
}

// Adds/removes days from the day list, depending on the month/year
function FixDayList(DayList, NewDays) {
   var DayPick = DayList.selectedIndex + 1;
   if (NewDays != DayList.length) {
      var OldSize = DayList.length;
      for (var k=Math.min(NewDays,OldSize);k<Math.max(NewDays,OldSize);k++) {
         (k >= NewDays) ? DayList.options[NewDays] = null : DayList.options[k] = new Option(k+1, k+1);
      }
      DayPick = Math.min(DayPick, NewDays);
      DayList.options[DayPick-1].selected = true;
   }
   return DayPick;
}

// Resets the year to its previous valid value when something invalid is entered
function FixYearInput(YearField) {
   var YearRE = new RegExp('\\d{' + YearField.defaultValue.length + '}');
   if (!YearRE.test(YearField.value)) YearField.value = YearField.defaultValue;
}

// Displays a message in the status bar when hovering over the calendar icon
function CalIconHover(Over) {
   var Message = (this.isShowing()) ? CalHideTxt : CalShowTxt;
   self.status = (Over) ? ClickTxt + Message : '';
   return true;
}

// Starts the timer over from scratch
function CalTimerReset() {
   eval('clearTimeout(' + this.timerID + ')');
   eval(this.timerID + '=setTimeout(\'' + this.objName + '.show()\',' + (HideWait * 1000) + ')');
}

// The timer for the calendar
function DoTimer(CancelTimer) {
   if (CancelTimer) eval('clearTimeout(' + this.timerID + ')');
   else {
      eval(this.timerID + '=null');
      this.resetTimer();
   }
}



// Show or hide the calendar
function ShowCalendar() {
   if (this.isShowing()) {
      var StopTimer = true;
      this.getCalendar().style.zIndex = --ZCounter;
      this.getCalendar().style.visibility = 'hidden';
      this.fixSelects(false);
      
   }
   else {
      var StopTimer = false;
      this.fixSelects(true);
      this.getCalendar().style.zIndex = ++ZCounter;
      this.getCalendar().style.visibility = 'visible';
   }
   this.handleTimer(StopTimer);
   self.status = '';
}

// Hides the input elements when the "blank" month is selected
function SetElementStatus(Hide) {
   this.getDayList().style.visibility = (Hide) ? 'hidden' : 'visible';
   this.getYearField().style.visibility = (Hide) ? 'hidden' : 'visible';
   this.getCalendarLink().style.visibility = (Hide) ? 'hidden' : 'visible';
}

// Sets the date, based on the month selected
function CheckMonthChange(MonthList) {
   var DayList = this.getDayList();
   if (MonthList.options[MonthList.selectedIndex].value == '') {
      DayList.selectedIndex = 0;
      this.hideElements(true);
      this.setHidden('');
   }
   else {
      this.hideElements(false);
      if (this.isShowing()) {
         this.resetTimer(); // Gives the user more time to view the calendar with the newly-selected month
         this.getCalendar().style.zIndex = ++ZCounter; // Make sure this calendar is on top of any other calendars
      }
      var DayPick = FixDayList(DayList, GetDayCount(this.picked.yearValue, MonthList.options[MonthList.selectedIndex].value));
      this.setPicked(this.picked.yearValue, MonthList.options[MonthList.selectedIndex].value, DayPick);
   }
}

// Sets the date, based on the day selected
function CheckDayChange(DayList) {
   if (this.isShowing()) this.show();
   this.setPicked(this.picked.yearValue, this.picked.monthIndex, DayList.selectedIndex+1);
}

// Changes the date when a valid year has been entered
function CheckYearInput(YearField) {
   if ((YearField.value.length == YearField.defaultValue.length) && (YearField.defaultValue != YearField.value)) {
      if (this.isShowing()) {
         this.resetTimer(); // Gives the user more time to view the calendar with the newly-entered year
         this.getCalendar().style.zIndex = ++ZCounter; // Make sure this calendar is on top of any other calendars
      }
      var NewYear = GetGoodYear(YearField.value);
      var MonthList = this.getMonthList();
      var NewDay = FixDayList(this.getDayList(), GetDayCount(NewYear, this.picked.monthIndex));
      this.setPicked(NewYear, this.picked.monthIndex, NewDay);
      YearField.defaultValue = YearField.value;
   }
}

// Holds characteristics about a date
function dateObject() {
   if (Function.call) { // Used when 'call' method of the Function object is supported
      var ParentObject = this;
      var ArgumentStart = 0;
   }
   else { // Used with 'call' method of the Function object is NOT supported
      var ParentObject = arguments[0];
      var ArgumentStart = 1;
   }
   ParentObject.date = (arguments.length == (ArgumentStart+1)) ? new Date(arguments[ArgumentStart+0]) : new Date(arguments[ArgumentStart+0], arguments[ArgumentStart+1], arguments[ArgumentStart+2]);
   ParentObject.yearValue = ParentObject.date.getFullYear();
   ParentObject.monthIndex = ParentObject.date.getMonth();
   ParentObject.monthName = MonthNames[ParentObject.monthIndex];
   ParentObject.fullName = ParentObject.monthName + ' ' + ParentObject.yearValue;
   ParentObject.day = ParentObject.date.getDate();
   ParentObject.dayCount = GetDayCount(ParentObject.yearValue, ParentObject.monthIndex);
   var FirstDate = new Date(ParentObject.yearValue, ParentObject.monthIndex, 1);
   ParentObject.firstDay = FirstDate.getDay();  
   
   if (myStartDay > 0) {  // +KH: Calendar start day- default: Sunday = 0 | Monday = 1
       if (ParentObject.firstDay == 0) ParentObject.firstDay = 7;  // +KH:  Sunday is the first day in week
       ParentObject.firstDay = ParentObject.firstDay -1;           // +KH:  Monday is the first day in week
   }
}

// Keeps track of the date that goes into the hidden field
function storedMonthObject(DateFormat, DateYear, DateMonth, DateDay) {
   (Function.call) ? dateObject.call(this, DateYear, DateMonth, DateDay) : dateObject(this, DateYear, DateMonth, DateDay);
   this.yearPad = this.yearValue.toString();
   this.monthPad = (this.monthIndex < 9) ? '0' + String(this.monthIndex + 1) : this.monthIndex + 1;
   this.dayPad = (this.day < 10) ? '0' + this.day.toString() : this.day;
   this.monthShort = this.monthName.substr(0,3).toUpperCase();
   // Formats the year with 2 digits instead of 4
   if (DateFormat.indexOf('YYYY') == -1) this.yearPad = this.yearPad.substr(2);
   // Define the date-part delimiter
   if (DateFormat.indexOf('/') >= 0) var Delimiter = '/';
   else if (DateFormat.indexOf('-') >= 0) var Delimiter = '-'; 
   else if (DateFormat.indexOf('.') >= 0) var Delimiter = '.';  // +kh
   else var Delimiter = '';
   // Determine the order of the months and days
   if (/DD?.?((MON)|(MM?M?))/.test(DateFormat)) {
      this.formatted = this.dayPad + Delimiter;
      this.formatted += (RegExp.$1.length == 3) ? this.monthShort : this.monthPad;
   }
   else if (/((MON)|(MM?M?))?.?DD?/.test(DateFormat)) {
      this.formatted = (RegExp.$1.length == 3) ? this.monthShort : this.monthPad;
      this.formatted += Delimiter + this.dayPad;
   }
   // Either prepend or append the year to the formatted date
   this.formatted = (DateFormat.substr(0,2) == 'YY') ? this.yearPad + Delimiter + this.formatted : this.formatted + Delimiter + this.yearPad;
}

// Object for the current displayed month
function displayMonthObject(ParentObject, DateYear, DateMonth, DateDay) {
   (Function.call) ? dateObject.call(this, DateYear, DateMonth, DateDay) : dateObject(this, DateYear, DateMonth, DateDay);
   this.displayID = ParentObject.hiddenFieldName + '_Current_ID';
   this.getDisplay = new Function('return document.getElementById(this.displayID)');
   this.dayHover = DayCellHover;
   this.goCurrent = new Function(ParentObject.objName + '.getCalendar().style.zIndex=++ZCounter;' + ParentObject.objName + '.setDisplayed(Today.getFullYear(),Today.getMonth());');
   if (ParentObject.formNumber >= 0) this.getDisplay().innerHTML = this.fullName;
}

// Object for the previous/next buttons
function neighborMonthObject(ParentObject, IDText, DateMS) {
   (Function.call) ? dateObject.call(this, DateMS) : dateObject(this, DateMS);
   this.buttonID = ParentObject.hiddenFieldName + '_' + IDText + '_ID';
   this.hover = new Function('C','O','NeighborHover(C,O,this)');
   this.getButton = new Function('return document.getElementById(this.buttonID)');
   this.go = new Function(ParentObject.objName + '.getCalendar().style.zIndex=++ZCounter;' + ParentObject.objName + '.setDisplayed(this.yearValue,this.monthIndex);');
   if (ParentObject.formNumber >= 0) this.getButton().title = this.monthName;
}

// Sets the currently-displayed month object
function SetDisplayedMonth(DispYear, DispMonth) {
   this.displayed = new displayMonthObject(this, DispYear, DispMonth, 1);
   // Creates the previous and next month objects
   this.previous = new neighborMonthObject(this, 'Previous', this.displayed.date.getTime() - 86400000);
   this.next = new neighborMonthObject(this, 'Next', this.displayed.date.getTime() + (86400000 * (this.displayed.dayCount + 1)));
   // Creates the HTML for the calendar
   if (this.formNumber >= 0) this.getDayTable().innerHTML = this.buildCalendar();
}

// Sets the current selected date
function SetPickedMonth(PickedYear, PickedMonth, PickedDay) {
   this.picked = new storedMonthObject(this.format, PickedYear, PickedMonth, PickedDay);
   this.setHidden(this.picked.formatted);
   this.setDisplayed(PickedYear, PickedMonth);
}

// The calendar object
function calendarObject(DateName, DateFormat, DefaultDate) {

   /* Properties */
   this.hiddenFieldName = DateName;
   this.monthListID = DateName + '_Month_ID';
   this.dayListID = DateName + '_Day_ID';
   this.yearFieldID = DateName + '_Year_ID';
   this.monthDisplayID = DateName + '_Current_ID';
   this.calendarID = DateName + '_ID';
   this.dayTableID = DateName + '_DayTable_ID';
   this.calendarLinkID = this.calendarID + '_Link';
   this.timerID = this.calendarID + '_Timer';
   this.objName = DateName + '_Object';
   this.format = DateFormat;
   this.formNumber = -1;
   this.picked = null;
   this.displayed = null;
   this.previous = null;
   this.next = null;

   /* Methods */
   this.setPicked = SetPickedMonth;
   this.setDisplayed = SetDisplayedMonth;
   this.checkYear = CheckYearInput;
   this.fixYear = FixYearInput;
   this.changeMonth = CheckMonthChange;
   this.changeDay = CheckDayChange;
   this.resetTimer = CalTimerReset;
   this.hideElements = SetElementStatus;
   this.show = ShowCalendar;
   this.handleTimer = DoTimer;
   this.iconHover = CalIconHover;
   this.buildCalendar = BuildCalendarDays;
   this.pickDay = PickDisplayDay;
   this.fixSelects = FixSelectLists;
   this.setHidden = new Function('D','if (this.formNumber >= 0) this.getHiddenField().value=D');
   // Returns a reference to these elements
   this.getHiddenField = new Function('return document.forms[this.formNumber].elements[this.hiddenFieldName]');
   this.getMonthList = new Function('return document.getElementById(this.monthListID)');
   this.getDayList = new Function('return document.getElementById(this.dayListID)');
   this.getYearField = new Function('return document.getElementById(this.yearFieldID)');
   this.getCalendar = new Function('return document.getElementById(this.calendarID)');
   this.getDayTable = new Function('return document.getElementById(this.dayTableID)');
   this.getCalendarLink = new Function('return document.getElementById(this.calendarLinkID)');
   this.getMonthDisplay = new Function('return document.getElementById(this.monthDisplayID)');
   this.isShowing = new Function('return !(this.getCalendar().style.visibility != \'visible\')');

   /* Constructor */
   // Functions used only by the constructor
   function getMonthIndex(MonthAbbr) { // Returns the index (0-11) of the supplied month abbreviation
      for (var MonPos=0;MonPos<MonthNames.length;MonPos++) {
         if (MonthNames[MonPos].substr(0,3).toUpperCase() == MonthAbbr.toUpperCase()) break;
      }
      return MonPos;
   }
   function SetGoodDate(CalObj, Notify) { // Notifies the user about their bad default date, and sets the current system date
      CalObj.setPicked(Today.getFullYear(), Today.getMonth(), Today.getDate());
      if (Notify) alert('WARNING: The supplied date is not in valid \'' + DateFormat + '\' format: ' + DefaultDate + '.\nTherefore, the current system date will be used instead: ' + CalObj.picked.formatted);
   }
   // Main part of the constructor
   if (DefaultDate != '') {
      if ((this.format == 'YYYYMMDD') && (/^(\d{4})(\d{2})(\d{2})$/.test(DefaultDate))) this.setPicked(RegExp.$1, parseInt(RegExp.$2,10)-1, RegExp.$3);
      else {
         // Get the year
         if ((this.format.substr(0,2) == 'YY') && (/^(\d{2,4})(.|-|\/)/.test(DefaultDate))) { // Year is at the beginning
            var YearPart = GetGoodYear(RegExp.$1);
            // Determine the order of the months and days
            if (/(.|-|\/)(\w{1,3})(.|-|\/)(\w{1,3})$/.test(DefaultDate)) {
               var MidPart = RegExp.$2;
               var EndPart = RegExp.$4;
               if (/D$/.test(this.format)) { // Ends with days
                  var DayPart = EndPart;
                  var MonthPart = MidPart;
               }
               else {
                  var DayPart = MidPart;
                  var MonthPart = EndPart;
               }
               MonthPart = (/\d{1,2}/i.test(MonthPart)) ? parseInt(MonthPart,10)-1 : getMonthIndex(MonthPart);
               this.setPicked(YearPart, MonthPart, DayPart);
            }
            else SetGoodDate(this, true);
         }
         else if (/(.|-|\/)(\d{2,4})$/.test(DefaultDate)) { // Year is at the end
            var YearPart = GetGoodYear(RegExp.$2);
            // Determine the order of the months and days
            if (/^(\w{1,3})(.|-|\/)(\w{1,3})(.|-|\/)/.test(DefaultDate)) {
               if (this.format.substr(0,1) == 'D') { // Starts with days
                  var DayPart = RegExp.$1;
                  var MonthPart = RegExp.$3;
               }
               else { // Starts with months
                  var MonthPart = RegExp.$1;
                  var DayPart = RegExp.$3;
               }
               MonthPart = (/\d{1,2}/i.test(MonthPart)) ? parseInt(MonthPart,10)-1 : getMonthIndex(MonthPart);
               this.setPicked(YearPart, MonthPart, DayPart);
            }
            else SetGoodDate(this, true);
         }
         else SetGoodDate(this, true);
      }
   }
}

// Main function that creates the form elements
function DateInput(DateName, Required, DateFormat, DefaultDate) {

   var MonthSelected = '';
   var DaySelected   = '';

   if (arguments.length == 0) document.writeln('<span style="color:red;font-size:' + FontSize + 'px;font-family:' + FontFamily + ';">ERROR: Missing required parameter in call to \'DateInput\': [name of hidden date field].</span>');
   else {
      // Handle DateFormat
      if (arguments.length < 3) { // The format wasn't passed in, so use default
         DateFormat = DefaultDateFormat;
         if (arguments.length < 2) Required = false;
      }
      else if (/^(Y{2,4}(.|-|\/)?)?((MON)|(MM?M?)|(DD?))(.|-|\/)?((MON)|(MM?M?)|(DD?))((.|-|\/)Y{2,4})?$/i.test(DateFormat)) DateFormat = DateFormat.toUpperCase();
      else { // Passed-in DateFormat was invalid, use default format instead
         var AlertMessage = 'WARNING: The supplied date format for the \'' + DateName + '\' field is not valid: ' + DateFormat + '\nTherefore, the default date format will be used instead: ' + DefaultDateFormat;
         DateFormat = DefaultDateFormat;
         if (arguments.length == 4) { // DefaultDate was passed in with an invalid date format
            var CurrentDate = new storedMonthObject(DateFormat, Today.getFullYear(), Today.getMonth(), Today.getDate());
            AlertMessage += '\n\nThe supplied date (' + DefaultDate + ') cannot be interpreted with the invalid format.\nTherefore, the current system date will be used instead: ' + CurrentDate.formatted;
            DefaultDate = CurrentDate.formatted;
         }
         alert(AlertMessage);
      }
      // Define the current date if it wasn't set already
      if (!CurrentDate) var CurrentDate = new storedMonthObject(DateFormat, Today.getFullYear(), Today.getMonth(), Today.getDate());
      // Handle DefaultDate
      if (arguments.length < 4) { // The date wasn't passed in
         DefaultDate = (Required) ? CurrentDate.formatted : ''; // If required, use today's date
      }
      // Creates the calendar object!
      eval(DateName + '_Object=new calendarObject(\'' + DateName + '\',\'' + DateFormat + '\',\'' + DefaultDate + '\')');
      // Determine initial viewable state of day, year, and calendar icon
      if ((Required) || (arguments.length == 4)) {
         var InitialStatus = '';
         var InitialDate = eval(DateName + '_Object.picked.formatted');
      }
      else {
         var InitialStatus = ' style="visibility:hidden"';
         var InitialDate = '';
         eval(DateName + '_Object.setPicked(' + Today.getFullYear() + ',' + Today.getMonth() + ',' + Today.getDate() + ')');
      }
      // Create the form elements  [Month] [Day] [year]
      with (document) {
         writeln('<input type="hidden" name="' + DateName + '" value="' + InitialDate + '">');
         // Find this form number
         for (var f=0;f<forms.length;f++) {
            for (var e=0;e<forms[f].elements.length;e++) {
               if (typeof forms[f].elements[e].type == 'string') {
                  if ((forms[f].elements[e].type == 'hidden') && (forms[f].elements[e].name == DateName)) {
                     eval(DateName + '_Object.formNumber='+f);
                     break;
                  }
               }
            }
         }
         writeln('<table cellpadding="2" cellspacing="1"><tr>' + eol + '<td valign="middle">' );

         if (lang_de == 1) { // language German   [Day] [Month] [Year] instead of  [Month] [Day] [Year]
         // Day
            writeln('<select' + InitialStatus + ' class="calendarDateInput" id="' + DateName + '_Day_ID" onChange="' + DateName + '_Object.changeDay(this)">');

            for (var j=1;j<=eval(DateName + '_Object.picked.dayCount');j++) {
               DaySelected = ((DefaultDate != '') && (eval(DateName + '_Object.picked.day') == j)) ? ' selected' : '';
               writeln('<option' + DaySelected + '>' + j + '</option>');
            }
            writeln('</select>' + eol + '</td>' + eol + '<td valign="middle">');
         }
         
         // Month
         writeln('<select class="calendarDateInput" id="' + DateName + '_Month_ID" onChange="' + DateName + '_Object.changeMonth(this)">');
         if (!Required) {
            var NoneSelected = (DefaultDate == '') ? ' selected' : '';
            writeln('<option value=""' + NoneSelected + '>' + UnselectedMonthText + '</option>');
         }
         for (var i=0;i<12;i++) {
            MonthSelected = ((DefaultDate != '') && (eval(DateName + '_Object.picked.monthIndex') == i)) ? ' selected' : '';
            writeln('<option value="' + i + '"' + MonthSelected + '>' + MonthNames[i].substr(0,3) + '</option>');
         }
         writeln('</select>' + eol + '</td>' + eol);

         if ((lang_de < 1)) {  // other language      [Month] [Day] [Year]
         // Day
            writeln('<td valign="middle">');
            writeln('<select' + InitialStatus + ' class="calendarDateInput" id="' + DateName + '_Day_ID" onChange="' + DateName + '_Object.changeDay(this)">');

            for (var j=1;j<=eval(DateName + '_Object.picked.dayCount');j++) {
              DaySelected = ((DefaultDate != '') && (eval(DateName + '_Object.picked.day') == j)) ? ' selected' : '';
              writeln('<option' + DaySelected + '>' + j + '</option>');
            }
            writeln('</select>' + eol + '</td>' + eol);
         }
         
         // Year
         writeln('<td valign="middle">');
         writeln('<input' + InitialStatus + ' class="calendarDateInput" type="text" id="' + DateName + '_Year_ID" size="' + eval(DateName + '_Object.picked.yearPad.length') + '" maxlength="' + eval(DateName + '_Object.picked.yearPad.length') + '" title="Jahr" value="' + eval(DateName + '_Object.picked.yearPad') + '" onKeyPress="return YearDigitsOnly(window.event)" onKeyUp="' + DateName + '_Object.checkYear(this)" onBlur="' + DateName + '_Object.fixYear(this)">');
         write('<td valign="middle">' + eol + '<a' + InitialStatus + ' id="' + DateName + '_ID_Link" href="javascript:' + DateName + '_Object.show()" onMouseOver="return ' + DateName + '_Object.iconHover(true)" onMouseOut="return ' + DateName + '_Object.iconHover(false)"><img src="' + ImageURL + '" align="baseline" title="Kalender" border="0"></a>&nbsp;');
         writeln('<span id="' + DateName + '_ID" style="position:absolute;visibility:hidden;width:' + ( (CellWidth * 7)+ 14 + WeekNoCellWidth + 2 ) + 'px;background-color:' + CalBGColor + ';border:1px solid dimgray;" onMouseOver="' + DateName + '_Object.handleTimer(true)" onMouseOut="' + DateName + '_Object.handleTimer(false)">');

// Calendar head
         writeln('<table width="' + ((CellWidth * 7) + 14 + WeekNoCellWidth +2) + '" cellspacing="0" cellpadding="0">' + eol + '<tr style="background-color:' + TopRowBGColor + ';">');
// prev
         writeln('<td id="' + DateName + '_Previous_ID" height="' + (CellHeight+1) + '" width="' + (WeekNoCellWidth-1) + '" class="calendarDateInput" style="cursor:default; border-left:1px solid ' + TopRowBGColor + ';" onClick="' + DateName + '_Object.previous.go()" onMouseDown="VirtualButton(this,true)" onMouseUp="VirtualButton(this,false)" onMouseOver="return ' + DateName + '_Object.previous.hover(this,true)" onMouseOut="return ' + DateName + '_Object.previous.hover(this,false)" title="' + eval(DateName + '_Object.previous.monthName') + '"><img src="' + PrevURL + '" border="0" /></td>');
// Month
         writeln('<td id="' + DateName + '_Current_ID" style="cursor:pointer" height="' + (CellHeight+1) + '" align="center" class="calendarDateInput" colspan="'+ (myCellCount-2) +'" onClick="' + DateName + '_Object.displayed.goCurrent()" onMouseOver="self.status=\'Click to view ' + CurrentDate.fullName + '\';return true;" onMouseOut="self.status=\'\';return true;" title="'+CalHeadTxt+'">' + eval(DateName + '_Object.displayed.fullName') + '</td>');
// next
         writeln('<td id="' + DateName + '_Next_ID" style="cursor:default" height="' + (CellHeight+1) + '" align="center" class="calendarDateInput" style="height:' + (CellHeight+1) + '" onClick="' + DateName + '_Object.next.go()" onMouseDown="VirtualButton(this,true)" onMouseUp="VirtualButton(this,false)" onMouseOver="return ' + DateName + '_Object.next.hover(this,true)" onMouseOut="return ' + DateName + '_Object.next.hover(this,false)" title="' + eval(DateName + '_Object.next.monthName') + '"><img src="' + NextURL + '" border="0" /></td></tr>' + eol + '<tr>');
// Calendar Day names
         if (myWeekNo > 0) 
            writeln('<td align="center" class="calendarDateInput" height="' + CellHeight + '" width="' + (WeekNoCellWidth+1) + '" style="font-weight:normal; border-top:1px solid dimgray;border-bottom:1px solid dimgray;">' + myWeekNoTxt + '</td>');
         for (var w=0;w<7;w++) writeln('<td width="' + CellWidth + '" align="center" class="calendarDateInput" style="height:' + CellHeight + ';width:' + CellWidth + ';font-weight:bold;border-top:1px solid dimgray;border-bottom:1px solid dimgray;">' + WeekDays[w] + '</td>');

         writeln('</tr>' + eol + '<tr>');

         // Cell width fix using transp. images (yes is it an very old technic, but it works)
         // CW cell
         if (myWeekNo > 0) writeln('<td height="1" style="'+WeekNoCellBorder+'"><img src="'+spacer+'" width="' + WeekNoCellWidth + '" height="1" vspace="0" hspace="0" border="0" /></td>');
         // Day cell
         for (var w=0;w<7;w++) writeln('<td height="1"><img src="'+spacer+'" width="' + CellWidth + '" height="1" vspace="0" hspace="0" border="0" /></td>');



// Calendar grid
         writeln('</tr>' + eol + '</table>' + eol + '<span id="' + DateName + '_DayTable_ID">' + eval(DateName + '_Object.buildCalendar()') + '</span>' + eol + '</span>' + eol + '</td>' + eol + '</tr>' + eol + '</table>');
      }
   }
}