  var timeoutDelay = 0; // milliseconds, change this if you like, set to 0 for the calendar to never auto disappear
  var g_startDay = 0// 0=sunday, 1=monday

  // preload images
  var imgUp = new Image(8,12);
  imgUp.src = 'images/vor.gif';
  var imgDown = new Image(8,12);
  imgDown.src = 'images/zurueck.gif';

  // used by timeout auto hide functions
  var timeoutId = false;

  // the now standard browser sniffer class
  function Browser(){
    this.dom = document.getElementById?1:0;
    this.ie4 = (document.all && !this.dom)?1:0;
    this.ns4 = (document.layers && !this.dom)?1:0;
    this.ns6 = (this.dom && !document.all)?1:0;
    this.ie5 = (this.dom && document.all)?1:0;
    this.ok = this.dom || this.ie4 || this.ns4;
    this.platform = navigator.platform;
  }
  var browser = new Browser();


  function changeTo(targetName)
  {
    target.value=targetName;
  }

  // dom browsers require this written to the HEAD section

  if (browser.dom || browser.ie4){
      document.writeln('<style>');
    document.writeln('#container {');
    document.writeln('position : absolute;');
    document.writeln('left : 100px;');
    document.writeln('top : 100px;');
    document.writeln('width : 124px;');;
    browser.platform=='Win32'?height=140:height=145;
    document.writeln('height : ' + height +'px;');
    document.writeln('clip:rect(0px 124px ' + height + 'px 0px);');
    //document.writeln('overflow : hidden;');
    document.writeln('visibility : hidden;');
    document.writeln('background-color : #ffffff');
    document.writeln('}');
    document.writeln('</style>')
    document.write('<div style="z-index:99;" id="container"');
    if (timeoutDelay) document.write(' onmouseout="calendarTimeout();" onmouseover="if (timeoutId) clearTimeout(timeoutId);"');
    document.write('></div>');
  }

  var kalender;  // global to hold the calendar reference, set by constructor

  function calendarTimeout(){
    if (browser.ie4 || browser.ie5){
      if (window.event.srcElement && window.event.srcElement.name!='month') timeoutId=setTimeout('kalender.hide();',timeoutDelay);
    }
    if (browser.ns6 || browser.ns4){
      timeoutId=setTimeout('kalender.hide();',timeoutDelay);
    }
  }

  // constructor for calendar class
  function Calendar(){
    kalender = this;
    // some constants needed throughout the program
    this.daysOfWeek = new Array("So","Mo","Di","Mi","Do","Fr","Sa");
    this.months = new Array("Januar","Februar","März","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember");
    this.daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

    if (browser.ns4){
      var tmpLayer = new Layer(127);
    if (timeoutDelay){
      tmpLayer.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
      tmpLayer.onmouseover = function(event) { if (timeoutId) clearTimeout(timeoutId); };
      tmpLayer.onmouseout = function(event) { timeoutId=setTimeout('kalender.hide()',timeoutDelay);};
    }
      tmpLayer.x = 100;
      tmpLayer.y = 100;
      tmpLayer.bgColor = "#ffffff";
    }
    if (browser.dom || browser.ie4){
    var tmpLayer = browser.dom?document.getElementById('container'):document.all.container;
    }
    this.containerLayer = tmpLayer;
    if (browser.ns4 && browser.platform=='Win32') {
      this.containerLayer.clip.height=134;
      this.containerLayer.clip.width=127;
    }

  }

   Calendar.prototype.getFirstDOM = function() {
    var thedate = new Date();
    thedate.setDate(1);
    thedate.setMonth(this.month);
    thedate.setFullYear(this.year);
    return thedate.getDay();
  }

  Calendar.prototype.getDaysInMonth = function (){
     if (this.month!=1) {
     return this.daysInMonth[this.month]
     }
     else {
       // is it a leap year
        if (Date.isLeapYear(this.year)) {
        return 29;
      }
        else {
        return 28;
      }
     }
  }

  Calendar.prototype.buildString = function(){
    var tmpStr = '<form onSubmit="this.year.blur();return false;"><table width="100%" border="0" cellspacing="0" cellpadding="2" class="calBorderColor"><tr><td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
    tmpStr += '<tr>';
    tmpStr += '<td width="60%" class="cal" align="left">';
    if (this.hasDropDown) {
      tmpStr += '<select class="month" name="month" onchange="kalender.selectChange();">';
    for (var i=0;i<this.months.length;i++){
        tmpStr += '<option value="' + i + '"'
      if (i == this.month) tmpStr += ' selected';
      tmpStr += '>' + this.months[i] + '</option>';
      }
      tmpStr += '</select>';
    } else {
      tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td><a href="javascript: kalender.changeMonth(-1);"><img name="calendar" src="' + imgDown.src + '" width="8" height="12" border="0" alt=""></a></td><td class="cal" width="100%" align="center">' + this.months[this.month] + '</td><td class="cal"><a href="javascript: kalender.changeMonth(+1);"><img name="calendar" src="' + imgUp.src + '" width="8" height="12" border="0" alt=""></a></td></tr></table>';
    }
    tmpStr += '</td>';
    /* observation : for some reason if the below event is changed to 'onChange' rather than 'onBlur' it totally crashes IE (4 and 5)!
    */
    tmpStr += '<td width="40%" align="right" class="cal">';

    if (this.hasDropDown) {
      tmpStr += '<input class="year" type="text" size="';
      // get round NS4 win32 lenght of year input problem
      (browser.ns4 && browser.platform=='Win32')?tmpStr += 1:tmpStr += 4;
    tmpStr += '" name="year" maxlength="4" onBlur="kalender.inputChange();" value="' + this.year + '">';
    } else {
    tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td class="cal"><a href="javascript: kalender.changeYear(-1);"><img name="calendar" src="' + imgDown.src +'" width="8" height="12" border="0" alt=""></a></td><td class="cal" width="100%" align="center">' + this.year + '</td><td class="cal"><a href="javascript: kalender.changeYear(+1);"><img name="calendar" src="' + imgUp.src + '" width="8" height="12" border="0" alt=""></a></td></tr></table>'
    }
    tmpStr += '</td>';
    tmpStr += '</tr>';
    tmpStr += '</table>';
    var iCount = 1;

    var iFirstDOM = (7+this.getFirstDOM()-g_startDay)%7; // to prevent calling it in a loop

    var iDaysInMonth = this.getDaysInMonth(); // to prevent calling it in a loop

    tmpStr += '<table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
    tmpStr += '<tr>';
      for (var i=0;i<7;i++){
      tmpStr += '<td align="center" class="calDaysColor">' + this.daysOfWeek[(g_startDay+i)%7] + '</td>';
    }
    tmpStr += '</tr>';
    var tmpFrom = parseInt('' + this.dateFromYear + this.dateFromMonth + this.dateFromDay,10);
    var tmpTo = parseInt('' + this.dateToYear + this.dateToMonth + this.dateToDay,10);
    var tmpCompare;
    for (var j=1;j<=6;j++){
       tmpStr += '<tr>';
       for (var i=1;i<=7;i++){
       tmpStr += '<td width="16" align="center" '
       if ( (7*(j-1) + i)>=iFirstDOM+1  && iCount <= iDaysInMonth){
         if (iCount==this.day && this.year==this.oYear && this.month==this.oMonth) tmpStr += 'class="calHighlightColor"';
       else {
          if (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"';
        else tmpStr += 'class="cal"';
       }
         tmpStr += '>';
       /* could create a date object here and compare that but probably more efficient to convert to a number
         and compare number as numbers are primitives */
       tmpCompare = parseInt('' + this.year + padZero(this.month) + padZero(iCount),10);
       if (tmpCompare >= tmpFrom && tmpCompare <= tmpTo) {
         tmpStr += '<a class="cal" href="javascript:kalender.clickDay(' + iCount + ');">' + iCount + '</a>';
       } else {
         tmpStr += '<span class="disabled">' + iCount + '</span>';
       }
       iCount++;
       } else {
         if  (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"'; else tmpStr +='class="cal"';
       tmpStr += '>&nbsp;';
       }
       tmpStr += '</td>'
     }
     tmpStr += '</tr>'
    }
    tmpStr += '</table></td></tr></table></form>'
    return tmpStr;
  }

  Calendar.prototype.selectChange = function(){
    this.month = browser.ns6?this.containerLayer.ownerDocument.forms[0].month.selectedIndex:this.containerLayer.document.forms[0].month.selectedIndex;
    this.writeString(this.buildString());
  }

  Calendar.prototype.inputChange = function(){
    var tmp = browser.ns6?this.containerLayer.ownerDocument.forms[0].year:this.containerLayer.document.forms[0].year;
    if (tmp.value >=1900 || tmp.value <=2100){
      this.year = tmp.value;
      this.writeString(this.buildString());
    } else {
      tmp.value = this.year;
    }
  }
  Calendar.prototype.changeYear = function(incr){
     (incr==1)?this.year++:this.year--;
     this.writeString(this.buildString());
  }
  Calendar.prototype.changeMonth = function(incr){
      if (this.month==11 && incr==1){
        this.month = 0;
        this.year++;
      } else {
        if (this.month==0 && incr==-1){
          this.month = 11;
        this.year--;
        } else {
        (incr==1)?this.month++:this.month--;
      }
    }
    this.writeString(this.buildString());
  }

  Calendar.prototype.clickDay = function(day)
  {
    //alert(this.target);

     //var tmp = eval('document.' + this.target);
     var tmp=this.field;

     //var tmp = document.phpdoc.getElementById("TEST3");

     var old_value=""; //tmp.value;

     if (this.dateFormat=='dd-mmm-yyyy' || this.dateFormat=='dd/mmm/yyyy') tmp.value = day + this.dateDelim + this.months[this.month].substr(0,3) + this.dateDelim + this.year;
     if (this.dateFormat=='dd/mm/yyyy' || this.dateFormat=='dd-mm-yyyy') tmp.value = day + this.dateDelim + (this.month+1) + this.dateDelim + this.year;
     if (this.dateFormat=='dd.mm.yyyy' || this.dateFormat=='dd.mm.yyyy') tmp.value = day + this.dateDelim + (this.month+1) + this.dateDelim + this.year;
     if (this.dateFormat=='mm/dd/yyyy' || this.dateFormat=='mm-dd-yyyy') tmp.value = (this.month+1) + this.dateDelim + day + this.dateDelim + this.year;
     if (this.dateFormat=='yyyy-mm-dd') tmp.value = this.year + this.dateDelim + (this.month+1) + this.dateDelim + day;

     if (browser.ns4)
     {
       this.containerLayer.hidden=true;
     }
     if (browser.dom || browser.ie4)
     {
       this.containerLayer.style.visibility='hidden'
     }

     var new_value=tmp.value;

     if(old_value!=new_value)
     {
       var eval_str="anonymous(); "+tmp.onchange;
       //eval(eval_str);
     }

     //alert(new_value);
  }

  Calendar.prototype.xclickDay = function(day)
  {
  }

  Calendar.prototype.writeString = function(str){
    if (browser.ns4){
      this.containerLayer.document.open();
      this.containerLayer.document.write(str);
      this.containerLayer.document.close();
    }
    if (browser.dom || browser.ie4){
      this.containerLayer.innerHTML = str;
    }
  }

  Calendar.prototype.show = function(event, target, bHasDropDown, dateFormat, dateFrom, dateTo){
  // calendar can restrict choices between 2 dates, if however no restrictions
  // are made, let them choose any date between 1900 and 3000
  if (dateFrom) this.dateFrom = dateFrom; else this.dateFrom = new Date(1900,0,1);
  this.dateFromDay = padZero(this.dateFrom.getDate());
  this.dateFromMonth = padZero(this.dateFrom.getMonth());
  this.dateFromYear = this.dateFrom.getFullYear();
  if (dateTo) this.dateTo = dateTo; else this.dateTo = new Date(3000,0,1);
  this.dateToDay = padZero(this.dateTo.getDate());
  this.dateToMonth = padZero(this.dateTo.getMonth());
  this.dateToYear = this.dateTo.getFullYear();
  this.hasDropDown = bHasDropDown;
  if (dateFormat) this.dateFormat = dateFormat; else this.dateFormat = 'dd-mmm-yyyy';
  switch (this.dateFormat){
    case 'dd-mmm-yyyy':
    case 'dd-mm-yyyy':
    case 'yyyy-mm-dd':
      this.dateDelim = '-';
    break;
     case 'dd.mmm.yyyy':
    case 'dd.mm.yyyy':
    case 'yyyy.mm.dd':
      this.dateDelim = '.';
    break;
    case 'dd/mm/yyyy':
    case 'mm/dd/yyyy':
    case 'dd/mmm/yyyy':
      this.dateDelim = '/';
    break;
  }

    if (browser.ns4) {
      if (!this.containerLayer.hidden) {
      this.containerLayer.hidden=true;
      return;
    }
     }
    if (browser.dom || browser.ie4){
      if (this.containerLayer.style.visibility=='visible') {
      this.containerLayer.style.visibility='hidden';
      return;
    }
    }

    if (browser.ie5 || browser.ie4){
      var event = window.event;
    }
    if (browser.ns4){
      this.containerLayer.x = event.x+10;
      this.containerLayer.y = event.y-5;
    }
    if (browser.ie5 || browser.ie4){
      var obj = event.srcElement;
       x = 0;
      while (obj.offsetParent != null) {
          x += obj.offsetLeft;
          obj = obj.offsetParent;
      }
      x += obj.offsetLeft;
      y = 0;
    var obj = event.srcElement;
      while (obj.offsetParent != null) {
          y += obj.offsetTop;
          obj = obj.offsetParent;
      }
      y += obj.offsetTop;

        this.containerLayer.style.left = x+35;
    if (event.y>0)this.containerLayer.style.top = y;
    }
    if (browser.ns6){
      this.containerLayer.style.left = event.pageX+10;
    this.containerLayer.style.top = event.pageY-5;
    }
    this.target = target;
    //var tmp = eval('document.getEle' + this.target);
    //this.field = eval('document.' + this.target);
    var tmp=document.getElementById(this.target);
    this.field=tmp;

    //alert("x:"+this.field.value);
    if (tmp && tmp.value && tmp.value.split(this.dateDelim).length==3 && tmp.value.indexOf('d')==-1){
      var atmp = tmp.value.split(this.dateDelim)
    switch (this.dateFormat){
     case 'dd-mmm-yyyy':
     case 'dd/mmm/yyyy':
     case 'dd.mmm.yyyy':
       for (var i=0;i<this.months.length;i++){
         if (atmp[1].toLowerCase()==this.months[i].substr(0,3).toLowerCase()){
           this.month = this.oMonth = i;
         break;
         }
       }
       this.day = parseInt(atmp[0],10);
       this.year = this.oYear = parseInt(atmp[2],10);
       break;
     case 'dd/mm/yyyy':
     case 'dd-mm-yyyy':
     case 'dd.mm.yyyy':
       this.month = this.oMonth = parseInt(atmp[1]-1,10);
       this.day = parseInt(atmp[0],10);
       this.year = this.oYear = parseInt(atmp[2],10);
       break;
     case 'mm/dd/yyyy':
     case 'mm-dd-yyyy':
     case 'mm.dd.yyyy':
       this.month = this.oMonth = parseInt(atmp[0]-1,10);
       this.day = parseInt(atmp[1],10);
       this.year = this.oYear = parseInt(atmp[2],10);
       break;
     case 'yyyy-mm-dd':
     case 'yyyy.mm.dd':
       this.month = this.oMonth = parseInt(atmp[1]-1,10);
       this.day = parseInt(atmp[2],10);
       this.year = this.oYear = parseInt(atmp[0],10);
       break;
    }
    } else { // no date set, default to today
      var theDate = new Date();
       this.year = this.oYear = theDate.getFullYear();
       this.month = this.oMonth = theDate.getMonth();
       this.day = this.oDay = theDate.getDate();
    }
    this.writeString(this.buildString());

    // and then show it!
     if (browser.ns4) {
     this.containerLayer.hidden=false;
     }
    if (browser.dom || browser.ie4){
        this.containerLayer.style.visibility='visible';
    }
  }

  Calendar.prototype.hide = function(){
    if (browser.ns4) this.containerLayer.hidden = true;
    if (browser.dom || browser.ie4){
      this.containerLayer.style.visibility='hidden';
    }
  }

  function handleDocumentClick(e){
    if (browser.ie4 || browser.ie5) e = window.event;

    if (browser.ns6){
      var bTest = (e.pageX > parseInt(kalender.containerLayer.style.left,10) && e.pageX <  (parseInt(kalender.containerLayer.style.left,10)+125) && e.pageY < (parseInt(kalender.containerLayer.style.top,10)+125) && e.pageY > parseInt(kalender.containerLayer.style.top,10));
      if (e.target.name!='imgCalendar' && e.target.name!='month'  && e.target.name!='year' && e.target.name!='calendar' && !bTest){
      kalender.hide();
    }
    }
    if (browser.ie4 || browser.ie5){
    // extra test to see if user clicked inside the calendar but not on a valid date, we don't want it to disappear in this case
     var bTest = (e.x > parseInt(kalender.containerLayer.style.left,10) && e.x <  (parseInt(kalender.containerLayer.style.left,10)+125) && e.y < (parseInt(kalender.containerLayer.style.top,10)+125) && e.y > parseInt(kalender.containerLayer.style.top,10));
      if (e.srcElement.name!='imgCalendar' && e.srcElement.name!='month' && e.srcElement.name!='year' && !bTest & typeof(e.srcElement)!='object'){
      kalender.hide();
    }
    }
    if (browser.ns4) kalender.hide();
  }

  // utility function
  function padZero(num) {
    return ((num <= 9) ? ("0" + num) : num);
  }
    // Finally licked extending  native date object;
    Date.isLeapYear = function(year){ if (year%4==0 && ((year%100!=0) || (year%400==0))) return true; else return false; }
    Date.daysInYear = function(year){ if (Date.isLeapYear(year)) return 366; else return 365;}
    var DAY = 1000*60*60*24;
    Date.prototype.addDays = function(num){
    return new Date((num*DAY)+this.valueOf());
    }

   // events capturing, careful you don't override this by setting something in the onload event of
  // the body tag
  window.onload=function(){
    new Calendar(new Date());
    if (browser.ns4){
      if (typeof document.NSfix == 'undefined'){
      document.NSfix = new Object();
        document.NSfix.initWidth=window.innerWidth;
      document.NSfix.initHeight=window.innerHeight;
    }
    }
  }
  if (browser.ns4) window.onresize = function(){
    if (document.NSfix.initWidth!=window.innerWidth || document.NSfix.initHeight!=window.innerHeight) window.location.reload(false);
  } // ns4 resize bug workaround
  window.document.onclick=handleDocumentClick;
    window.onerror = function(msg,url,line){
    //alert('******* an error has occurred ********' +
    //'\n\nPlease check that' +
    //'\n\n1)You have not added any code to the body onload event,'
    //+  '\nif you want to run something as well as the calendar initialisation'
    //+ '\ncode, add it to the onload event in the calendar library.'
    //+ '\n\n2)You have set the parameters correctly in the kalender.show() method '
    //+ '\n\nSee www.totallysmartit.com\\examples\\calendar\\simple.asp for examples'
    //+ '\n\n------------------------------------------------------'
    //+ '\nError details'
    //+ '\nText:' + msg + '\nurl:' + url + '\nline:' + line);
  }