var languageCode = 'en';    // Possible values:     en,ge,no
                            // en = english, ge = german, no = norwegian
                            
var calendar_offsetTop = 0;        // Offset - calendar placement - You probably have to modify this value if you're not using a strict doctype
var calendar_offsetLeft = 0;    // Offset - calendar placement - You probably have to modify this value if you're not using a strict doctype
var calendarDiv = false;

var MSIE = false;
if(navigator.userAgent.indexOf('MSIE')>=0 && navigator.userAgent.indexOf('Opera')<0)MSIE=true;



switch(languageCode){
    case "en":
        var monthArray = ['January','February','March','April','May','June','July','August','September','October','November','December'];
        var monthArrayShort = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
        var dayArray = ['Mon','Tue','Wed','Thu','Fri','Sat','Sun'];
        var weekString = 'Week';
        var todayString = 'Today is';
        break;
    case "ge":
        var monthArray = ['Jänner','Februar','März','April','Mai','Juni','Juli','August','September','Oktober','November','Dezember'];
        var monthArrayShort = ['Jan','Feb','Mar','Apr','Mai','Jun','Jul','Aug','Sep','Okt','Nov','Dez'];
        var dayArray = ['Mon','Die','Mit','Don','Fre','Sam','Son'];    
        var weekString = 'Woche';
        var todayString = 'Heute';
        
        break;
    case "no":
        var monthArray = ['Januar','Februar','Mars','April','Mai','Juni','Juli','August','September','Oktober','November','Desember'];
        var monthArrayShort = ['Jan','Feb','Mar','Apr','Mai','Jun','Jul','Aug','Sep','Okt','Nov','Des'];
        var dayArray = ['Man','Tir','Ons','Tor','Fre','L&oslash;r','S&oslash;n'];    
        var weekString = 'Uke';
        var todayString = 'Dagen i dag er';
        break;    
}



var daysInMonthArray = [31,28,31,30,31,30,31,31,30,31,30,31];
var currentMonth;
var currentYear;
var calendarContentDiv;
var returnDateTo;
var returnFormat;
var activeSelectBoxMonth;
var activeSelectBoxYear;
var iframeObj = false;

var returnDateToYear;
var returnDateToMonth;
var returnDateToDay;

var inputYear;
var inputMonth;
var inputDay;


var selectBoxHighlightColor = '#D60808'; // Highlight color of select boxes
var selectBoxRolloverBgColor = '#E2EBED'; // Background color on drop down lists(rollover)
function cancelCalendarEvent()
{
    return false;
}
function isLeapYear(inputYear)
{
    if(inputYear%4==0)return true;
    if(inputYear%100==0)return true;
    if(inputYear%400==0)return true;
    return false;    
    
}
var activeSelectBoxMonth = false;

function highlightMonthYear()
{
    if(activeSelectBoxMonth)activeSelectBoxMonth.className='';
    
    if(this.className=='monthYearActive'){
        this.className='';    
    }else{
        this.className = 'monthYearActive';
        activeSelectBoxMonth = this;
    }
}

function showMonthDropDown()
{
    if(document.getElementById('monthDropDown').style.display=='block'){
        document.getElementById('monthDropDown').style.display='none';    
    }else{
        document.getElementById('monthDropDown').style.display='block';        
        document.getElementById('yearDropDown').style.display='none';
    }
}

function showYearDropDown()
{
    if(document.getElementById('yearDropDown').style.display=='block'){
        document.getElementById('yearDropDown').style.display='none';    
    }else{
        document.getElementById('yearDropDown').style.display='block';    
        document.getElementById('monthDropDown').style.display='none';    
    }        

}

function selectMonth()
{
    document.getElementById('calendar_month_txt').innerHTML = this.innerHTML
    currentMonth = this.id.replace(/[^\d]/g,'');

    document.getElementById('monthDropDown').style.display='none';
    for(var no=0;no<monthArray.length;no++){
        document.getElementById('monthDiv_'+no).style.color='';    
    }
    this.style.color = selectBoxHighlightColor;
    activeSelectBoxMonth = this;
    writeCalendarContent();
    
}

function selectYear()
{
    document.getElementById('calendar_year_txt').innerHTML = this.innerHTML
    currentYear = this.innerHTML.replace(/[^\d]/g,'');
    document.getElementById('yearDropDown').style.display='none';
    if(activeSelectBoxYear){
        activeSelectBoxYear.style.color='';
    }
    activeSelectBoxYear=this;
    this.style.color = selectBoxHighlightColor;
    writeCalendarContent();
    
}

function switchMonth()
{
    if(this.src.indexOf('left')>=0){
        currentMonth=currentMonth-1;;
        if(currentMonth<0){
            currentMonth=11;
            currentYear=currentYear-1;
        }
    }else{
        currentMonth=currentMonth+1;;
        if(currentMonth>11){
            currentMonth=0;
            currentYear=currentYear/1+1;
        }    
    }    
    
    writeCalendarContent();    
    
    
}

function createMonthDiv(){
    var div = document.createElement('DIV');
    div.className='monthYearPicker';
    div.id = 'monthPicker';
    
    for(var no=0;no<monthArray.length;no++){
        var subDiv = document.createElement('DIV');
        subDiv.innerHTML = monthArray[no];
        subDiv.onmouseover = highlightMonthYear;
        subDiv.onmouseout = highlightMonthYear;
        subDiv.onclick = selectMonth;
        subDiv.id = 'monthDiv_' + no;
        subDiv.style.width = '56px';
        subDiv.onselectstart = cancelCalendarEvent;        
        div.appendChild(subDiv);
        if(currentMonth && currentMonth==no){
            subDiv.style.color = selectBoxHighlightColor;
            activeSelectBoxMonth = subDiv;
        }                
        
    }    
    return div;
    
}

function changeSelectBoxYear()
{

    var yearItems = this.parentNode.getElementsByTagName('DIV');
    if(this.innerHTML.indexOf('-')>=0){
        var startYear = yearItems[1].innerHTML/1 -1;
        if(activeSelectBoxYear){
            activeSelectBoxYear.style.color='';
        }
    }else{
        var startYear = yearItems[1].innerHTML/1 +1;
        if(activeSelectBoxYear){
            activeSelectBoxYear.style.color='';

        }            
    }

    for(var no=1;no<yearItems.length-1;no++){
        yearItems[no].innerHTML = startYear+no-1;    
        yearItems[no].id = 'yearDiv' + (startYear/1+no/1-1);    
        
    }        
    if(activeSelectBoxYear){
        activeSelectBoxYear.style.color='';
        if(document.getElementById('yearDiv'+currentYear)){
            activeSelectBoxYear = document.getElementById('yearDiv'+currentYear);
            activeSelectBoxYear.style.color=selectBoxHighlightColor;;
        }
    }
}

function updateYearDiv()
{
    var div = document.getElementById('yearDropDown');
    var yearItems = div.getElementsByTagName('DIV');
    for(var no=1;no<yearItems.length-1;no++){
        yearItems[no].innerHTML = currentYear/1 -6 + no;    
        if(currentYear==(currentYear/1 -6 + no)){
            yearItems[no].style.color = selectBoxHighlightColor;
            activeSelectBoxYear = yearItems[no];                
        }else{
            yearItems[no].style.color = '';
        }
    }        
}

function updateMonthDiv()
{
    for(no=0;no<12;no++){
        document.getElementById('monthDiv_' + no).style.color = '';
    }        
    document.getElementById('monthDiv_' + currentMonth).style.color = selectBoxHighlightColor;
    activeSelectBoxMonth =     document.getElementById('monthDiv_' + currentMonth);
}

function createYearDiv()
{

    if(!document.getElementById('yearDropDown')){
        var div = document.createElement('DIV');
        div.className='monthYearPicker';
    }else{
        var div = document.getElementById('yearDropDown');
        var subDivs = div.getElementsByTagName('DIV');
        for(var no=0;no<subDivs.length;no++){
            subDivs[no].parentNode.removeChild(subDivs[no]);    
        }    
    }    
    
    
    var d = new Date();
    if(currentYear){
        d.setFullYear(currentYear);    
    }

    var startYear = d.getFullYear()/1 - 5;

    
    var subDiv = document.createElement('DIV');
    subDiv.innerHTML = '&nbsp;&nbsp;- ';
    subDiv.onclick = changeSelectBoxYear;
    subDiv.onmouseover = highlightMonthYear;
    subDiv.onmouseout = highlightMonthYear;    
    subDiv.onselectstart = cancelCalendarEvent;            
    div.appendChild(subDiv);
    
    for(var no=startYear;no<(startYear+10);no++){
        var subDiv = document.createElement('DIV');
        subDiv.innerHTML = no;
        subDiv.onmouseover = highlightMonthYear;
        subDiv.onmouseout = highlightMonthYear;        
        subDiv.onclick = selectYear;        
        subDiv.id = 'yearDiv' + no;    
        subDiv.onselectstart = cancelCalendarEvent;    
        div.appendChild(subDiv);
        if(currentYear && currentYear==no){
            subDiv.style.color = selectBoxHighlightColor;
            activeSelectBoxYear = subDiv;
        }            
    }
    var subDiv = document.createElement('DIV');
    subDiv.innerHTML = '&nbsp;&nbsp;+ ';
    subDiv.onclick = changeSelectBoxYear;
    subDiv.onmouseover = highlightMonthYear;
    subDiv.onmouseout = highlightMonthYear;        
    subDiv.onselectstart = cancelCalendarEvent;            
    div.appendChild(subDiv);        

    
    return div;
}

function highlightSelect()
{
    if(this.className=='selectBox'){
        this.className = 'selectBoxOver';    
        this.getElementsByTagName('IMG')[0].src = 'js_calendar/images/down_over.gif';
    }else{
        this.className = 'selectBox';    
        this.getElementsByTagName('IMG')[0].src = 'js_calendar/images/down.gif';
    }
    
}

function highlightArrow()
{
    if(this.src.indexOf('over')>=0){
        if(this.src.indexOf('left')>=0)this.src = 'js_calendar/images/left.gif';
        if(this.src.indexOf('right')>=0)this.src = 'js_calendar/images/right.gif';
    }else{
        if(this.src.indexOf('left')>=0)this.src = 'js_calendar/images/left_over.gif';
        if(this.src.indexOf('right')>=0)this.src = 'js_calendar/images/right_over.gif';
    }
}

function highlightClose()
{
    if(this.src.indexOf('over')>=0){
        this.src = 'js_calendar/images/close.gif';
    }else{
        this.src = 'js_calendar/images/close_over.gif';
    }    

}

function closeCalendar(){

    document.getElementById('yearDropDown').style.display='none';
    document.getElementById('monthDropDown').style.display='none';
        
    calendarDiv.style.display='none';
    if(iframeObj)iframeObj.style.display='none';
    if(activeSelectBoxMonth)activeSelectBoxMonth.className='';
    if(activeSelectBoxYear)activeSelectBoxYear.className='';
    

}

function writeTopBar()
{

    var topBar = document.createElement('DIV');
    topBar.className = 'topBar';
    topBar.id = 'topBar';
    calendarDiv.appendChild(topBar);
    
    // Left arrow
    var leftDiv = document.createElement('DIV');
    leftDiv.style.marginRight = '1px';
    var img = document.createElement('IMG');
    img.src = 'js_calendar/images/left.gif';
    img.onmouseover = highlightArrow;
    img.onclick = switchMonth;
    img.onmouseout = highlightArrow;
    leftDiv.appendChild(img);
    topBar.appendChild(leftDiv);
    
    // Right arrow
    var rightDiv = document.createElement('DIV');
    rightDiv.style.marginRight = '1px';
    var img = document.createElement('IMG');
    img.src = 'js_calendar/images/right.gif';
    img.onclick = switchMonth;
    img.onmouseover = highlightArrow;
    img.onmouseout = highlightArrow;
    rightDiv.appendChild(img);
    topBar.appendChild(rightDiv);        

            
    // Month selector
    var monthDiv = document.createElement('DIV');
    monthDiv.id = 'monthSelect';
    monthDiv.onmouseover = highlightSelect;
    monthDiv.onmouseout = highlightSelect;
    monthDiv.onclick = showMonthDropDown;
    var span = document.createElement('SPAN');        
    span.innerHTML = monthArray[currentMonth];
    span.id = 'calendar_month_txt';
    monthDiv.appendChild(span);

    var img = document.createElement('IMG');
    img.src = 'js_calendar/images/down.gif';
    img.style.position = 'absolute';
    img.style.right = '0px';
    monthDiv.appendChild(img);
    monthDiv.className = 'selectBox';
    topBar.appendChild(monthDiv);

    var monthPicker = createMonthDiv();
    monthPicker.style.left = '37px';

    monthPicker.style.top = monthDiv.offsetTop + monthDiv.offsetHeight + 1 + 'px';
    monthPicker.style.width ='60px';
    monthPicker.id = 'monthDropDown';
    
    calendarDiv.appendChild(monthPicker);
            
    // Year selector
    var yearDiv = document.createElement('DIV');
    yearDiv.onmouseover = highlightSelect;
    yearDiv.onmouseout = highlightSelect;
    yearDiv.onclick = showYearDropDown;
    var span = document.createElement('SPAN');        
    span.innerHTML = currentYear;
    span.id = 'calendar_year_txt';
    yearDiv.appendChild(span);
    topBar.appendChild(yearDiv);
    
    var img = document.createElement('IMG');
    img.src = 'js_calendar/images/down.gif';
    yearDiv.appendChild(img);
    yearDiv.className = 'selectBox';
    
    var yearPicker = createYearDiv();
    yearPicker.style.left = '113px';
    yearPicker.style.top = monthDiv.offsetTop + monthDiv.offsetHeight + 1 + 'px';
    yearPicker.style.width = '35px';
    yearPicker.id = 'yearDropDown';
    calendarDiv.appendChild(yearPicker);
    
        
    var img = document.createElement('IMG');
    img.src = 'js_calendar/images/close.gif';
    img.style.styleFloat = 'right';
    img.onmouseover = highlightClose;
    img.onmouseout = highlightClose;
    img.onclick = closeCalendar;
    topBar.appendChild(img);
    if(!document.all){
        img.style.position = 'absolute';
        img.style.right = '2px';
    }
    
    

}

function writeCalendarContent()
{
    if(!calendarContentDiv){
        calendarContentDiv = document.createElement('DIV');
        calendarDiv.appendChild(calendarContentDiv);
        

        
    }
    
    var d = new Date();        
    d.setMonth(currentMonth);
    d.setFullYear(currentYear);        
    d.setDate(0);        


    document.getElementById('calendar_year_txt').innerHTML = currentYear;
    document.getElementById('calendar_month_txt').innerHTML = monthArray[currentMonth];
    
    var existingTable = calendarContentDiv.getElementsByTagName('TABLE');
    if(existingTable.length>0){
        calendarContentDiv.removeChild(existingTable[0]);
    }
    
    var calTable = document.createElement('TABLE');
    calTable.cellSpacing = '0';
    calendarContentDiv.appendChild(calTable);
    var calTBody = document.createElement('TBODY');
    calTable.appendChild(calTBody);
    var row = calTBody.insertRow(-1);
    var cell = row.insertCell(-1);
    cell.innerHTML = weekString;
    cell.style.backgroundColor = selectBoxRolloverBgColor;
    
    for(var no=0;no<dayArray.length;no++){
        var cell = row.insertCell(-1);
        cell.innerHTML = dayArray[no]; 
    }
    
    var row = calTBody.insertRow(-1);
    var cell = row.insertCell(-1);
    cell.style.backgroundColor = selectBoxRolloverBgColor;
    var week = getWeek(currentYear,currentMonth,1);
    cell.innerHTML = week;        // Week
    for(var no=0;no<d.getDay();no++){
        var cell = row.insertCell(-1);
        cell.innerHTML = '&nbsp;';
    }

    var colCounter = d.getDay();
    var daysInMonth = daysInMonthArray[currentMonth];
    if(daysInMonth==28){
        if(isLeapYear(currentYear))daysInMonth=29;
    }
    
    for(var no=1;no<=daysInMonth;no++){
        d.setDate(no-1);
        if(colCounter>0 && colCounter%7==0){
            var row = calTBody.insertRow(-1);
            var cell = row.insertCell(-1);
            var week = getWeek(currentYear,currentMonth,no);
            cell.innerHTML = week;        // Week    
            cell.style.backgroundColor = selectBoxRolloverBgColor;            
        }
        var cell = row.insertCell(-1);
        if(currentYear==inputYear && currentMonth == inputMonth && no==inputDay){
            cell.style.color = '#FF0000';    
        }
        cell.innerHTML = no;
        cell.onclick = pickDate;
        colCounter++;
    }
    
    
    if(!document.all){
        if(calendarContentDiv.offsetHeight)
            document.getElementById('topBar').style.top = calendarContentDiv.offsetHeight + document.getElementById('topBar').offsetHeight -1 + 'px';
        else{
            document.getElementById('topBar').style.top = '';
            document.getElementById('topBar').style.bottom = '0px';
        }
            
    }
    
    if(iframeObj){

        iframeObj.style.width = calendarDiv.offsetWidth + 'px';
        iframeObj.style.height = calendarDiv.offsetHeight + 'px' ;
    }
        
    
}

function pickDate()
{
    var month = currentMonth/1 +1;
    if(month<10)month = '0' + month;
    var day = this.innerHTML;
    if(day/1<10)day = '0' + day;
    if(returnFormat){
        returnFormat = returnFormat.replace('dd',day);
        returnFormat = returnFormat.replace('mm',month);
        returnFormat = returnFormat.replace('yyyy',currentYear);
        returnDateTo.value = returnFormat;
    }else{
        for(var no=0;no<returnDateToYear.options.length;no++){
            if(returnDateToYear.options[no].value==currentYear){
                returnDateToYear.selectedIndex=no;
                break;
            }                
        }
        for(var no=0;no<returnDateToMonth.options.length;no++){
            if(returnDateToMonth.options[no].value==month){
                returnDateToMonth.selectedIndex=no;
                break;
            }                
        }
        for(var no=0;no<returnDateToDay.options.length;no++){
            if(returnDateToDay.options[no].value==day){
                returnDateToDay.selectedIndex=no;
                break;
            }                
        }
        
        
    }
    closeCalendar();
    
}

// This function is from http://www.codeproject.com/csharp/gregorianwknum.asp
// Only changed the month add
function getWeek(year,month,day){
    day = day/1;
    year = year /1;
    month = month/1 + 1; //use 1-12
    var a = Math.floor((14-(month))/12);
    var y = year+4800-a;
    var m = (month)+(12*a)-3;
    var jd = day + Math.floor(((153*m)+2)/5) + 
                 (365*y) + Math.floor(y/4) - Math.floor(y/100) + 
                 Math.floor(y/400) - 32045;      // (gregorian calendar)
    var d4 = (jd+31741-(jd%7))%146097%36524%1461;
    var L = Math.floor(d4/1460);
    var d1 = ((d4-L)%365)+L;
    NumberOfWeek = Math.floor(d1/7) + 1;
    return NumberOfWeek;        
}

function writeBottomBar()
{
    var d = new Date();
    var topBar = document.createElement('DIV');
    topBar.id = 'topBar';
    topBar.className = 'todaysDate';
    topBar.innerHTML = todayString + ': ' + d.getDate() + '.' + monthArrayShort[d.getMonth()] + '. ' +  d.getFullYear() ;
    calendarDiv.appendChild(topBar);    
    
    
        
}
function getTopPos(inputObj)
{
    
  var returnValue = inputObj.offsetTop + inputObj.offsetHeight;
  while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetTop;
  return returnValue + calendar_offsetTop;
}

function getleftPos(inputObj)
{
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null)returnValue += inputObj.offsetLeft;
  return returnValue + calendar_offsetLeft;
}

function positionCalendar(inputObj)
{
    calendarDiv.style.left = getleftPos(inputObj) + 'px';
    calendarDiv.style.top = getTopPos(inputObj) + 'px';
    if(iframeObj){
        iframeObj.style.left = calendarDiv.style.left;
        iframeObj.style.top =  calendarDiv.style.top;
    }
        
}
    
function initCalendar()
{
    if(MSIE){
        iframeObj = document.createElement('IFRAME');
        iframeObj.style.position = 'absolute';
        iframeObj.border='0px';
        iframeObj.style.border = '0px';
        iframeObj.style.backgroundColor = '#FF0000';
        document.body.appendChild(iframeObj);
    }
        
    calendarDiv = document.createElement('DIV');    
    calendarDiv.id = 'calendarDiv';
    calendarDiv.style.zIndex = 1000;
    
    document.body.appendChild(calendarDiv);
    writeBottomBar();
    writeTopBar();
    

    
    if(!currentYear){
        var d = new Date();
        currentMonth = d.getMonth();
        currentYear = d.getFullYear();
    }
    writeCalendarContent();    


        
}


function displayCalendar(inputField,format,buttonObj)
{
    if(inputField.value.length==format.length){
        var monthPos = format.indexOf('mm');
        currentMonth = inputField.value.substr(monthPos,2)/1 -1;    
        var yearPos = format.indexOf('yyyy');
        currentYear = inputField.value.substr(yearPos,4);        
        var dayPos = format.indexOf('dd');
        tmpDay = inputField.value.substr(dayPos,2);    
    }else{
        var d = new Date();
        currentMonth = d.getMonth();
        currentYear = d.getFullYear();
        tmpDay = 1;
    }
    
    inputYear = currentYear;
    inputMonth = currentMonth;
    inputDay = tmpDay/1;
    
    if(!calendarDiv){
        initCalendar();            
    }else{
        writeCalendarContent();
    }            
    returnFormat = format;
    returnDateTo = inputField;
    positionCalendar(buttonObj);
    calendarDiv.style.visibility = 'visible';    
    calendarDiv.style.display = 'block';    
    if(iframeObj){
        iframeObj.style.display = '';
        iframeObj.style.height = calendarDiv.offsetHeight + 'px';
        iframeObj.style.width = calendarDiv.offsetWidth + 'px';
    }
    updateYearDiv();
    updateMonthDiv();
    
}

function displayCalendarSelectBox(yearInput,monthInput,dayInput,buttonObj)
{
    currentMonth = monthInput.options[monthInput.selectedIndex].value/1-1;
    currentYear = yearInput.options[yearInput.selectedIndex].value;

    inputYear = yearInput.options[yearInput.selectedIndex].value;
    inputMonth = monthInput.options[monthInput.selectedIndex].value/1 - 1;
    inputDay = dayInput.options[dayInput.selectedIndex].value/1;
            
    if(!calendarDiv){
        initCalendar();            
    }else{
        writeCalendarContent();
    }        

    returnDateToYear = yearInput;
    returnDateToMonth = monthInput;
    returnDateToDay = dayInput;
    

    

    
    returnFormat = false;
    returnDateTo = false;
    positionCalendar(buttonObj);
    calendarDiv.style.visibility = 'visible';    
    calendarDiv.style.display = 'block';
    if(iframeObj){
        iframeObj.style.display = '';
        iframeObj.style.height = calendarDiv.offsetHeight + 'px';
        iframeObj.style.width = calendarDiv.offsetWidth + 'px';    
    }
    updateYearDiv();
    updateMonthDiv();
        
}