//	written	by Tan Ling	Wee	on 2 Dec 2001
//	last updated 10 Apr 2002
//	email :	fuushikaden@yahoo.com
//  Modified (very little) by Sai on 01/02/05
//  email :	sai_freelance@yahoo.com
//  Modified (for VS2005 and latest browsers) by S. Baer on 2007-08-31
//  email : bae1@sevitec.ch

var	fixedX = -1 // x position (-1 if to appear below control)
var	fixedY = -1 // y position (-1 if to appear below control)
var startAt = 0 // 0 - sunday ; 1 - monday
var showWeekNumber = 0	// 0 - don't show; 1 - show
var showToday = 1		// 0 - don't show; 1 - show
var imgDir = ""	// directory for images, will be set in popupCalendar() method

var gotoString = "Go To Current Month"
var todayString = "Today is"
var weekString = "Wk"
var scrollLeftMessage = "Click to scroll to previous month. Hold mouse button to scroll automatically."
var scrollRightMessage = "Click to scroll to next month. Hold mouse button to scroll automatically."
var selectMonthMessage = "Click to select a month."
var selectYearMessage = "Click to select a year."
var selectDateMessage = "Select [date] as date." // do not replace [date], it will be replaced by date.

var	crossobj, crossMonthObj, crossYearObj, monthSelected, yearSelected, dateSelected, omonthSelected, oyearSelected, odateSelected, monthConstructed, yearConstructed, intervalID1, intervalID2, timeoutID1, timeoutID2, ctlToPlaceValue, ctlNow, dateFormat, nStartingYear

var	bPageLoaded=false
var	ie=document.all
var	dom=document.getElementById

var	ns4=document.layers
var	today =	new	Date()
var	dateNow	 = today.getDate()
var	monthNow = today.getMonth()
var	yearNow	 = today.getYear()
var	imgsrc = new Array("drop1.gif","drop2.gif","left1.gif","left2.gif","right1.gif","right2.gif")
var	img	= new Array()

var bShow = false;

/* hides <select> and <applet> objects (for IE only) */
function hideElement( elmID, overDiv )
{
  if( ie )
  {
    for( i = 0; i < document.all.tags( elmID ).length; i++ )
    {
      obj = document.all.tags( elmID )[i];
      
      if( !obj || !obj.offsetParent )
      {
        continue;
      }

      // Find the element's offsetTop and offsetLeft relative to the BODY tag.
      objLeft   = obj.offsetLeft;
      objTop    = obj.offsetTop;
      objParent = obj.offsetParent;
      
      while (objParent && objParent.tagName.toUpperCase() != "BODY" )
      {
        objLeft  += objParent.offsetLeft;
        objTop   += objParent.offsetTop;
        objParent = objParent.offsetParent;
      }
  
      objHeight = obj.offsetHeight;
      objWidth = obj.offsetWidth;

      if ((overDiv.offsetLeft + overDiv.offsetWidth ) <= objLeft );
      else if(( overDiv.offsetTop + overDiv.offsetHeight ) <= objTop );
      else if( overDiv.offsetTop >= ( objTop + objHeight ));
      else if( overDiv.offsetLeft >= ( objLeft + objWidth ));
      else
      {
        obj.style.visibility = "hidden";
      }
    }
  }
}
 
/*
* unhides <select> and <applet> objects (for IE only)
*/
function showElement( elmID )
{
  if( ie )
  {
    for( i = 0; i < document.all.tags( elmID ).length; i++ )
    {
      obj = document.all.tags( elmID )[i];
      
      if( !obj || !obj.offsetParent )
      {
        continue;
      }
    
      obj.style.visibility = "";
    }
  }
}

function HolidayRec (d, m, y, desc)
{
    this.d = d
    this.m = m
    this.y = y
    this.desc = desc
}

var HolidaysCounter = 0
var Holidays = new Array()

function addHoliday (d, m, y, desc)
{
    Holidays[HolidaysCounter++] = new HolidayRec ( d, m, y, desc )
}


if (dom)
{
    for	(i=0;i<imgsrc.length;i++)
    {
        img[i] = new Image
        img[i].src= img + imgsrc[i]
    }
    document.write ("<div onclick='bShow=true' id='calendar'	class='div-style'><table width="+((showWeekNumber==1)?250:220)+" class='table-style'><tr class='title-background-style' ><td><table width='"+((showWeekNumber==1)?248:218)+"'><tr><td class='title-style'><B><span id='caption'></span></B></td><td align=right style='text-align: right'><a href='javascript:hideCalendar()'><IMG id='closeimage' SRC='"+imgDir+"close.gif' WIDTH='15' HEIGHT='13' BORDER='0' ALT='Close the Calendar'></a></td></tr></table></td></tr><tr><td class='body-style'><span id='content'></span></td></tr>")
        
    if (showToday==1)
    {
        document.write ("<tr class='today-style'><td><span id='lblToday'></span></td></tr>")
    }
        
    document.write ("</table></div><div id='selectMonth' class='div-style'></div><div id='selectYear' class='div-style'></div>");
}

var	monthName =	new	Array("January","February","March","April","May","June","July","August","September","October","November","December")
if (startAt==0)
{
    dayName = new Array	("Sun","Mon","Tue","Wed","Thu","Fri","Sat")
}
else
{
    dayName = new Array	("Mon","Tue","Wed","Thu","Fri","Sat","Sun")
}


function swapImage(srcImg, destImg){
    if (ie)	{ document.getElementById(srcImg).setAttribute("src",imgDir + destImg) }
}

function init()	{

    if (!ns4)
    {
        if (!ie) { yearNow += 1900	}
        crossobj=(dom)?document.getElementById("calendar").style : ie? document.all.calendar : document.calendar
        hideCalendar()

        crossMonthObj=(dom)?document.getElementById("selectMonth").style : ie? document.all.selectMonth	: document.selectMonth

        crossYearObj=(dom)?document.getElementById("selectYear").style : ie? document.all.selectYear : document.selectYear

        monthConstructed=false;
        yearConstructed=false;

        if (showToday==1)
        {
            document.getElementById("lblToday").innerHTML =	todayString + " <a class='today-style' onmousemove='window.status=\""+gotoString+"\"' onmouseout='window.status=\"\"' title='"+gotoString+"' href='javascript:monthSelected=monthNow;yearSelected=yearNow;constructCalendar();'>"+dayName[(today.getDay()-startAt==-1)?6:(today.getDay()-startAt)]+", " + dateNow + " " + monthName[monthNow].substring(0,3)	+ "	" +	yearNow	+ "</a>"
        }

        sHTML1= "<span id='spanLeft'  class='title-control-normal-style' onmouseover='swapImage(\"changeLeft\",\"left2.gif\");this.className=\"title-control-select-style\";window.status=\""+scrollLeftMessage+"\"' onclick='javascript:decMonth()' onmouseout='clearInterval(intervalID1);swapImage(\"changeLeft\",\"left1.gif\");this.className=\"title-control-normal-style\";window.status=\"\"' onmousedown='clearTimeout(timeoutID1);timeoutID1=setTimeout(\"StartDecMonth()\",500)'	onmouseup='clearTimeout(timeoutID1);clearInterval(intervalID1)'>&nbsp<IMG id='changeLeft' SRC='"+imgDir+"left1.gif' width=10 height=11 BORDER=0>&nbsp</span>&nbsp;"
        sHTML1+="<span id='spanRight' class='title-control-normal-style' onmouseover='swapImage(\"changeRight\",\"right2.gif\");this.className=\"title-control-select-style\";window.status=\""+scrollRightMessage+"\"' onmouseout='clearInterval(intervalID1);swapImage(\"changeRight\",\"right1.gif\");this.className=\"title-control-normal-style\";window.status=\"\"' onclick='incMonth()' onmousedown='clearTimeout(timeoutID1);timeoutID1=setTimeout(\"StartIncMonth()\",500)'	onmouseup='clearTimeout(timeoutID1);clearInterval(intervalID1)'>&nbsp<IMG id='changeRight' SRC='"+imgDir+"right1.gif'	width=10 height=11 BORDER=0>&nbsp</span>&nbsp"
        sHTML1+="<span id='spanMonth' class='title-control-normal-style' onmouseover='swapImage(\"changeMonth\",\"drop2.gif\");this.className=\"title-control-select-style\";window.status=\""+selectMonthMessage+"\"' onmouseout='swapImage(\"changeMonth\",\"drop1.gif\");this.className=\"title-control-normal-style\";window.status=\"\"' onclick='popUpMonth()'></span>&nbsp;"
        sHTML1+="<span id='spanYear'  class='title-control-normal-style' onmouseover='swapImage(\"changeYear\",\"drop2.gif\");this.className=\"title-control-select-style\";window.status=\""+selectYearMessage+"\"'	onmouseout='swapImage(\"changeYear\",\"drop1.gif\");this.className=\"title-control-normal-style\";window.status=\"\"'	onclick='popUpYear()'></span>&nbsp;"
        
        document.getElementById("caption").innerHTML  =	sHTML1

        bPageLoaded=true
    }
}

function hideCalendar()	{
    if(crossobj){
        crossobj.visibility="hidden"
        if (crossMonthObj != null){crossMonthObj.visibility="hidden"}
        if (crossYearObj !=	null){crossYearObj.visibility="hidden"}

        showElement( 'SELECT' );
        showElement( 'APPLET' );
    }
}


function padZero(num) {
    return (num	< 10)? '0' + num : num ;
}

function constructDate(d,m,y)
{
    sTmp = dateFormat
    sTmp = sTmp.replace	("dd","<e>")
    sTmp = sTmp.replace	("d","<d>")
    sTmp = sTmp.replace	("<e>",padZero(d))
    sTmp = sTmp.replace	("<d>",d)
    sTmp = sTmp.replace	("mmm","<o>")
    sTmp = sTmp.replace	("mm","<n>")
    sTmp = sTmp.replace	("MM","<n>")
    sTmp = sTmp.replace	("m","<m>")
    sTmp = sTmp.replace	("<m>",m+1)
    sTmp = sTmp.replace	("<n>",padZero(m+1))
    sTmp = sTmp.replace	("<o>",monthName[m])
    return sTmp.replace ("yyyy",y)
}

function closeCalendar() {
    var	sTmp

    hideCalendar();
    ctlToPlaceValue.value =	constructDate(dateSelected,monthSelected,yearSelected)
}

/*** Month Pulldown	***/

function StartDecMonth()
{
    intervalID1=setInterval("decMonth()",80)
}

function StartIncMonth()
{
    intervalID1=setInterval("incMonth()",80)
}

function incMonth () {
    monthSelected++
    if (monthSelected>11) {
        monthSelected=0
        yearSelected++
    }
    constructCalendar()
}

function decMonth () {
    monthSelected--
    if (monthSelected<0) {
        monthSelected=11
        yearSelected--
    }
    constructCalendar()
}

function constructMonth() {
    popDownYear()
    if (!monthConstructed) {
        sHTML =	""
        for	(i=0; i<12;	i++) {
            sName =	monthName[i];
            if (i==monthSelected){
                sName =	"<B>" +	sName +	"</B>"
            }
            sHTML += "<tr><td id='m" + i + "' onmouseover='this.className=\"dropdown-select-style\"' onmouseout='this.className=\"dropdown-normal-style\"' onclick='monthConstructed=false;monthSelected=" + i + ";constructCalendar();popDownMonth();event.cancelBubble=true'>&nbsp;" + sName + "&nbsp;</td></tr>"
        }

        document.getElementById("selectMonth").innerHTML = "<table width=70	class='dropdown-style' cellspacing=0 onmouseover='clearTimeout(timeoutID1)'	onmouseout='clearTimeout(timeoutID1);timeoutID1=setTimeout(\"popDownMonth()\",100);event.cancelBubble=true'>" +	sHTML +	"</table>"

        monthConstructed=true
    }
}

function popUpMonth() {
    constructMonth()
    crossMonthObj.visibility = (dom||ie)? "visible"	: "show"
    crossMonthObj.left = parseInt(crossobj.left) + 50 + 'px'
    crossMonthObj.top =	parseInt(crossobj.top) + 26 + 'px'
}

function popDownMonth()	{
    crossMonthObj.visibility = "hidden"
}

/*** Year Pulldown ***/

function incYear() {
    for	(i=0; i<7; i++){
        newYear	= (i+nStartingYear)+1
        if (newYear==yearSelected)
        { txtYear =	"&nbsp;<B>"	+ newYear +	"</B>&nbsp;" }
        else
        { txtYear =	"&nbsp;" + newYear + "&nbsp;" }
        document.getElementById("y"+i).innerHTML = txtYear
    }
    nStartingYear ++;
    bShow=true
}

function decYear() {
    for	(i=0; i<7; i++){
        newYear	= (i+nStartingYear)-1
        if (newYear==yearSelected)
        { txtYear =	"&nbsp;<B>"	+ newYear +	"</B>&nbsp;" }
        else
        { txtYear =	"&nbsp;" + newYear + "&nbsp;" }
        document.getElementById("y"+i).innerHTML = txtYear
    }
    nStartingYear --;
    bShow=true
}

function selectYear(nYear) {
    yearSelected=parseInt(nYear+nStartingYear);
    yearConstructed=false;
    constructCalendar();
    popDownYear();
}

function constructYear() {
    popDownMonth()
    sHTML =	""
    if (!yearConstructed) {

        sHTML =	"<tr><td align='center'	onmouseover='this.className=\"dropdown-select-style\"' onmouseout='clearInterval(intervalID1);this.className=\"dropdown-normal-style\"' onmousedown='clearInterval(intervalID1);intervalID1=setInterval(\"decYear()\",30)' onmouseup='clearInterval(intervalID1)'>-</td></tr>"
        j =	0
        nStartingYear =	yearSelected-3
        for	(i=(yearSelected-3); i<=(yearSelected+3); i++) {
            sName =	i;
            if (i==yearSelected){
                sName =	"<B>" +	sName +	"</B>"
            }

            sHTML += "<tr><td id='y" + j + "' onmouseover='this.className=\"dropdown-select-style\"' onmouseout='this.className=\"dropdown-normal-style\"' onclick='selectYear("+j+");event.cancelBubble=true'>&nbsp;" + sName + "&nbsp;</td></tr>"
            j ++;
        }

        sHTML += "<tr><td align='center' onmouseover='this.className=\"dropdown-select-style\"' onmouseout='clearInterval(intervalID2);this.className=\"dropdown-normal-style\"' onmousedown='clearInterval(intervalID2);intervalID2=setInterval(\"incYear()\",30)'	onmouseup='clearInterval(intervalID2)'>+</td></tr>"

        document.getElementById("selectYear").innerHTML	= "<table width=44 class='dropdown-style' onmouseover='clearTimeout(timeoutID2)' onmouseout='clearTimeout(timeoutID2);timeoutID2=setTimeout(\"popDownYear()\",100)' cellspacing=0>"	+ sHTML	+ "</table>"

        yearConstructed	= true
    }
}

function popDownYear() {
    clearInterval(intervalID1)
    clearTimeout(timeoutID1)
    clearInterval(intervalID2)
    clearTimeout(timeoutID2)
    crossYearObj.visibility= "hidden"
}

function popUpYear() {
    var	leftOffset

    constructYear()
    crossYearObj.visibility	= (dom||ie)? "visible" : "show"
    leftOffset = parseInt(crossobj.left) + document.getElementById("spanYear").offsetLeft
    if (ie)
    {
        leftOffset += 6
    }
    crossYearObj.left =	leftOffset + 'px'
    crossYearObj.top = parseInt(crossobj.top) +	26 + 'px'
}

/*** calendar ***/

function WeekNbr(today)
{
    Year = takeYear(today);
    Month = today.getMonth();
    Day = today.getDate();
    now = Date.UTC(Year,Month,Day+1,0,0,0);
    var Firstday = new Date();
    Firstday.setYear(Year);
    Firstday.setMonth(0);
    Firstday.setDate(1);
    then = Date.UTC(Year,0,1,0,0,0);
    var Compensation = Firstday.getDay();
    if (Compensation > 3) Compensation -= 4;
    else Compensation += 3;
    NumberOfWeek =  Math.round((((now-then)/86400000)+Compensation)/7);
    return NumberOfWeek;
}

function takeYear(theDate)
{
    x = theDate.getYear();
    var y = x % 100;
    y += (y < 38) ? 2000 : 1900;
    return y;
}

function constructCalendar () {
    var dateMessage
    var	startDate =	new	Date (yearSelected,monthSelected,1)
    var	endDate	= new Date (yearSelected,monthSelected+1,1);
    endDate	= new Date (endDate	- (24*60*60*1000));
    numDaysInMonth = endDate.getDate()

    datePointer	= 0
    dayPointer = startDate.getDay() - startAt
    
    if (dayPointer<0)
    {
        dayPointer = 6
    }

    sHTML =	"<table	border=0 class='body-style'><tr>"

    if (showWeekNumber==1)
    {
        sHTML += "<td width=27><b>" + weekString + "</b></td><td width=1 rowspan=7 class='weeknumber-div-style'><img src='"+imgDir+"divider.gif' width=1></td>"
    }

    for	(i=0; i<7; i++)	{
        sHTML += "<td width='27' align='right'><B>"+ dayName[i]+"</B></td>"
    }
    sHTML +="</tr><tr>"
    
    if (showWeekNumber==1)
    {
        sHTML += "<td align=right>" + WeekNbr(startDate) + "&nbsp;</td>"
    }

    for	( var i=1; i<=dayPointer;i++ )
    {
        sHTML += "<td>&nbsp;</td>"
    }

    for	( datePointer=1; datePointer<=numDaysInMonth; datePointer++ )
    {
        dayPointer++;
        sHTML += "<td align=right>"

        var sStyle="normal-day-style"; //regular day

        if ((datePointer==dateNow)&&(monthSelected==monthNow)&&(yearSelected==yearNow)) //today
        { sStyle = "current-day-style"; } 
        else if	(dayPointer % 7 == (startAt * -1) +1) //end-of-the-week day
        { sStyle = "end-of-weekday-style"; }

        //selected day
        if ((datePointer==odateSelected) &&	(monthSelected==omonthSelected)	&& (yearSelected==oyearSelected))
        { sStyle += " selected-day-style"; }

        sHint = ""
        for (k=0;k<HolidaysCounter;k++)
        {
            if ((parseInt(Holidays[k].d)==datePointer)&&(parseInt(Holidays[k].m)==(monthSelected+1)))
            {
                if ((parseInt(Holidays[k].y)==0)||((parseInt(Holidays[k].y)==yearSelected)&&(parseInt(Holidays[k].y)!=0)))
                {
                    sStyle += " holiday-style";
                    sHint+=sHint==""?Holidays[k].desc:"\n"+Holidays[k].desc
                }
            }
        }

        var regexp= /\"/g
        sHint=sHint.replace(regexp,"&quot;")

        dateMessage = "onmousemove='window.status=\""+selectDateMessage.replace("[date]",constructDate(datePointer,monthSelected,yearSelected))+"\"' onmouseout='window.status=\"\"' "

        sHTML += "<a class='"+sStyle+"' "+dateMessage+" title=\"" + sHint + "\" href='javascript:dateSelected="+datePointer+";closeCalendar();'>&nbsp;" + datePointer + "&nbsp;</a>"

        sHTML += ""
        if ((dayPointer+startAt) % 7 == startAt) { 
            sHTML += "</tr><tr>" 
            if ((showWeekNumber==1)&&(datePointer<numDaysInMonth))
            {
                sHTML += "<td align=right>" + (WeekNbr(new Date(yearSelected,monthSelected,datePointer+1))) + "&nbsp;</td>"
            }
        }
    }

    document.getElementById("content").innerHTML   = sHTML
    document.getElementById("spanMonth").innerHTML = "&nbsp;" +	monthName[monthSelected] + "&nbsp;<IMG id='changeMonth' SRC='"+imgDir+"drop1.gif' WIDTH='12' HEIGHT='10' BORDER=0>"
    document.getElementById("spanYear").innerHTML =	"&nbsp;" + yearSelected	+ "&nbsp;<IMG id='changeYear' SRC='"+imgDir+"drop1.gif' WIDTH='12' HEIGHT='10' BORDER=0>"
}

function popUpCalendar(ctl,	imagePath, ctl2, format) {
    
    // save image path and adjust close button image which is already rendered
    imgDir = imagePath	    
    document.getElementById("closeimage").src = imagePath + 'close.gif'
    
    var	leftpos=0
    var	toppos=0
        
    if (bPageLoaded)
    {
        if ( crossobj.visibility ==	"hidden" ) {
            ctlToPlaceValue	= ctl2
            dateFormat=format;

            formatChar = " "
            aFormat	= dateFormat.split(formatChar)
            if (aFormat.length<3)
            {
                formatChar = "/"
                aFormat	= dateFormat.split(formatChar)
                if (aFormat.length<3)
                {
                    formatChar = "."
                    aFormat	= dateFormat.split(formatChar)
                    if (aFormat.length<3)
                    {
                        formatChar = "-"
                        aFormat	= dateFormat.split(formatChar)
                        if (aFormat.length<3)
                        {
                            // invalid date	format
                            formatChar=""
                        }
                    }
                }
            }

            tokensChanged =	0
            if ( formatChar	!= "" )
            {
                // use user's date
                aData =	ctl2.value.split(formatChar)

                for	(i=0;i<3;i++)
                {
                    if ((aFormat[i]=="d") || (aFormat[i]=="dd"))
                    {
                        dateSelected = parseInt(aData[i], 10)
                        tokensChanged ++
                    }
                    else if	((aFormat[i]=="m") || (aFormat[i]=="mm") || (aFormat[i]=="MM"))
                    {
                        monthSelected =	parseInt(aData[i], 10) - 1
                        tokensChanged ++
                    }
                    else if	(aFormat[i]=="yyyy")
                    {
                        yearSelected = parseInt(aData[i], 10)
                        tokensChanged ++
                    }
                    else if	(aFormat[i]=="mmm")
                    {
                        for	(j=0; j<12;	j++)
                        {
                            if (aData[i]==monthName[j])
                            {
                                monthSelected=j
                                tokensChanged ++
                            }
                        }
                    }
                }
            }

            if ((tokensChanged!=3)||isNaN(dateSelected)||isNaN(monthSelected)||isNaN(yearSelected))
            {
                dateSelected = dateNow
                monthSelected =	monthNow
                yearSelected = yearNow
            }

            odateSelected=dateSelected
            omonthSelected=monthSelected
            oyearSelected=yearSelected

            aTag = ctl
            do {
                aTag = aTag.offsetParent;
                leftpos	+= aTag.offsetLeft;
                toppos += aTag.offsetTop;
            } while(aTag.tagName!="BODY");
        
            crossobj.left =	(fixedX ==-1) ? ctl.offsetLeft + leftpos + 'px' : fixedX + 'px'
            crossobj.top = (fixedY==-1) ?ctl.offsetTop + toppos + ctl.offsetHeight + 2 + 'px' : fixedY + 'px'
            constructCalendar (1, monthSelected, yearSelected)
            crossobj.visibility=(dom||ie)? "visible" : "show";
            
            hideElement( 'SELECT', document.getElementById("calendar") )
            hideElement( 'APPLET', document.getElementById("calendar") )

            bShow = true;
        }
    }
    else
    {
        init()
        popUpCalendar(ctl, imagePath, ctl2, format)
    }
}

document.onkeypress = function hidecal1(evt)
{
    evt = (evt) ? evt : ((event) ? event : null);
    if (evt)
    {
        if (evt.keyCode==27) 
        {
            hideCalendar()
        }
    }
}

document.onclick = function hidecal2()
{
    if (!bShow)
    {
        hideCalendar()
    }
    bShow = false
}