/* *****************  */
/* **** calendar ***  */
/* *****************  */
Months = new Array(12);
Months[0] = "Januar";
Months[1] = "Februar";
Months[2] = "März";
Months[3] = "April";
Months[4] = "Mai";
Months[5] = "Juni";
Months[6] = "Juli";
Months[7] = "August";
Months[8] = "September";
Months[9] = "Oktober";
Months[10] = "November";
Months[11] = "Dezember";
function PadSpaces(TheString)
{
    var Spaces = "             ";
    len = Math.round((9 - TheString.length)/2);
    return Spaces.substring(0,len) + TheString;
}
function NumLeapYears(StartYear, EndYear)
{
    var LeapYears, i;
    if (EndYear >= StartYear){
            for(LeapYears = 0; StartYear <= EndYear; StartYear++)
            if (IsLeapYear(StartYear)) LeapYears++;
    }else{
    for(LeapYears = 0; EndYear <= StartYear; EndYear++)
            if (IsLeapYear(EndYear)) LeapYears++;
    }
    return LeapYears;
}
function IsLeapYear(Year)
{
    if(Math.round(Year/4) == Year/4){
            if(Math.round(Year/100) == Year/100){
                    if(Math.round(Year/400) == Year/400)
                            return true;
                    else return false;
            }else return true;
    }
    return false;
}
function Trim(TheString)
{
    var len;
    len = TheString.length;
    while(TheString.substring(0,1) == " "){ //trim left
            TheString = TheString.substring(1, len);
            len = TheString.length;
    }
    while(TheString.substring(len-1, len) == " "){ //trim right
            TheString = TheString.substring(0, len-1);
            len = TheString.length;
    }
    return TheString;
}
function DetermineMonthIdx()
{
    var i, month, month_s, len;
    month = Trim(document.getElementById('hiddenMonth').value);
    len = month.length;
    for( i = 0; i <12; i++){
            month_s = Months[i].substring(0,len);
            if (month_s.toUpperCase() == month.toUpperCase())
                    return (i);
    }
    return -1;
}
function FindNewYearStartingDay(Year)
{
    var LeapYears, Years, Day;
    LeapYears = NumLeapYears(1995, Year);
    if  (Year >=1995)
            Years = (Year -1995)+LeapYears;
    else    Years = (Year -1995)-LeapYears;
    if  (Year >=1995)
            Day = Math.round(((Years/7 - Math.floor(Years/7))*7)+.1);
    else    Day = Math.round(((Years/7 -  Math.ceil(Years/7))*7)-.1);
    if (Year >=1995){
            if(IsLeapYear(Year)) Day--;
    }else Day += 7;
    if(Day < 0) Day = 6;
    if(Day > 6) Day = 0;
    return Day;
}
function FindNumDaysInMonth(Year, Month)
{
    if(Month == 1){
            if(IsLeapYear(Year)) return 29;
            else return 28;
    }else{
            if(Month >6) Month++;
            if(Month/2 == Math.round(Month/2))  return 31;
    }
 return 30;
}
function FindMonthStartDay(NewYearDay, Year, Month)
{
    var MonthStartDay;
    AddArray = new Array(12);
    AddArray[0]=0;AddArray[1]=3;AddArray[2]=3;AddArray[3]=6;
    AddArray[4]=1;AddArray[5]=4;AddArray[6]=6;AddArray[7]=2;
    AddArray[8]=5;AddArray[9]=0;AddArray[10]=3;AddArray[11]=5;
    MonthStartDay = NewYearDay + AddArray[Month];
    if(IsLeapYear(Year)  && (Month ) > 1) MonthStartDay ++;
    if (MonthStartDay > 6) MonthStartDay -= 7;
    return MonthStartDay;
}
function FillCalendar()
{
    var Year, Month, Midx, NewYearDay, MonthStartDay;
    var NumDaysInMonth, i, t, x;
    Year = parseFloat(document.getElementById('hiddenYear' ).value);
    Month = document.getElementById('hiddenMonth').value;
    Midx  =  DetermineMonthIdx();
    if (Midx == -1){
            alert ("Can't recognize that month");
            return;
    }
    NewYearDay = FindNewYearStartingDay(Year);
    MonthStartDay = FindMonthStartDay(NewYearDay, Year,  Midx);
    NumDaysInMonth = FindNumDaysInMonth(Year, Midx);
    var allMyPrettyDivs = document.getElementsByTagName('div');
    var date=new Date();
    var dd=date.getDate();
    var mm=date.getMonth();
    var yy=date.getYear();
    var weekday=date.getDay();
    var dayLast=date.getDate();
    var monthLast=date.getMonth();
    var yearLast=date.getYear();
    if(date.getDate() +21 > NumDaysInMonth){
        dayLast = (dd + 21) - FindNumDaysInMonth(Year, Midx -1);
        monthLast = mm +1
    }
    else{
        dayLast = date.getDate() +21;
    }
    if (yy < 999){
         yy += 1900;
         yearLast+= 1900;
     }
    for(i = 0;  i < allMyPrettyDivs.length;  i++){
        if(i==0){
            x = 0;
        }
        if(allMyPrettyDivs[i].className == "row11" || allMyPrettyDivs[i].className == "row11before"|| allMyPrettyDivs[i].className == "withoutDay" || allMyPrettyDivs[i].className == "today"){
            t = x + 1 - MonthStartDay;
            if ( t >= 1  &&  t <= NumDaysInMonth)
            {
                allMyPrettyDivs[i].innerHTML = t;
                if(dd == t && mm ==  Midx && yy == Year){
                    allMyPrettyDivs[i].parentNode.className = "today";
                    allMyPrettyDivs[i].onclick = function (e) {
                    var monthNumber = Midx + 1;
                    var dayDate = this.innerHTML;
                    var monthDate = Midx + 1;
                    if(this.innerHTML.length==1)dayDate ='0' + dayDate;
                    if(monthDate < 10)monthDate ='0' + monthDate;
                    /* month + day + year */
                    document.getElementById('itdDateDayMonthYear').value = dayDate + '/' + monthDate +'/' + Year;
                    document.getElementById('calendar-border').style.display='none';
                    };
                }
                else{
                    allMyPrettyDivs[i].className = "row11";
                    allMyPrettyDivs[i].parentNode.className = "";
                    if(allMyPrettyDivs[i].id=='calRow_35' || allMyPrettyDivs[i].id=='calRow_28'){
                        allMyPrettyDivs[i].parentNode.parentNode.style.display='';
                    }
                    allMyPrettyDivs[i].onclick = function (e) {
                    var monthNumber = Midx + 1;
                    var dayDate = this.innerHTML;
                    var monthDate = Midx + 1;
                    if(this.innerHTML.length==1)dayDate ='0' + dayDate;
                    if(monthDate < 10)monthDate ='0' + monthDate;
                    document.getElementById('itdDateDayMonthYear').value = dayDate + '/' + monthDate +'/' + Year;
                    document.getElementById('calendar-border').style.display='none';
                    };
                }
            }
            else {
                if(allMyPrettyDivs[i].id=='calRow_35' || allMyPrettyDivs[i].id=='calRow_28'){
                    allMyPrettyDivs[i].parentNode.parentNode.style.display='none';
                }
                allMyPrettyDivs[i].innerHTML= " ";
                allMyPrettyDivs[i].className = "withoutDay";
            }
            x = x+1;
        }
    }
}
function IncDecYear(step)
{
    val =0;
    if(DetermineMonthIdx()=='11' && step=='next'){
        val = 1;
    }
    if(DetermineMonthIdx()=='0' && step=='prev'){
        val = -1;
    }
        var valNum = parseInt(val);
        var valNum2 = parseInt(document.getElementById('hiddenYear').value)
        document.getElementById('hiddenYear').value = valNum2 + valNum;
        document.getElementById('year').innerHTML = valNum2 + valNum;
        FillCalendar()
     if(step=='prev'){
         IncDecMonth(-1);
     }
     else{
         IncDecMonth(1);
     }
}
function IncDecMonth(val)
{
        var valNum = parseInt(val);
        var Midx  =  DetermineMonthIdx();
        var MonthSave = DetermineMonthIdx();
        Midx += valNum;
        if(Midx > 11) Midx = 0;
        if(Midx < 0)  Midx = 11;
        document.getElementById('hiddenMonth').value = PadSpaces(Months[Midx]);
        document.getElementById('month').innerHTML = PadSpaces(Months[Midx]);
        FillCalendar();
}