/*
        ****************************************************
        Author : Lea Smart
        Source : www.totallysmartit.com
        Date : 7/3/2001
        DHTML Calendar
        Version 1.1

        You are free to use this code if you retain this header.
        You do not need to link to my site (be nice though!)
        ******************************************************
        */
        var timeoutDelay = 2000; // milliseconds, change this if you like, set to 0 for the calendar to never auto disappear

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

        // 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 : 140px;');;
                document.writeln('height : 140px;');
                document.writeln('clip:rect(0px 140px 140px 0px);');
                document.writeln('overflow : hidden;');
            document.writeln('visibility : hidden;');
        //        document.writeln('background-color : #ffffff');
                document.writeln('}');
                document.writeln('</style>')
                document.write('<div id="container"');
                if (timeoutDelay) document.write(' onmouseout="calendarTimeout();" onmouseover="if (timeoutId) clearTimeout(timeoutId);"');
                document.write('></div>');
        }

        var g_Calendar;  // 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('g_Calendar.hide();',timeoutDelay);
          }
          if (browser.ns6 || browser.ns4){
            timeoutId=setTimeout('g_Calendar.hide();',timeoutDelay);
          }
        }

        // constructor for calendar class
        function Calendar(){
          g_Calendar = this;

          // some constants needed throughout the program
          this.daysOfWeek = new Array("Su","Mo","Tu","We","Th","Fr","Sa");
          this.months = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
          this.daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

          if (browser.ns4){
            var tmpLayer = new Layer(140);
                if (timeoutDelay){
                  tmpLayer.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
                  tmpLayer.onmouseover = function(event) { if (timeoutId) clearTimeout(timeoutId); };
                  tmpLayer.onmouseout = function(event) { timeoutId=setTimeout('g_Calendar.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) {
            this.containerLayer.clip.height=127;
            this.containerLayer.clip.width=126;
          }*/

        }

         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 (this.isLeapYear(this.year)) {
                          return 29;
                        }
                    else {
                          return 28;
                        }
           }
        }

        Calendar.prototype.isLeapYear = function() {
          if (this.year%4==0 && ((this.year%100!=0) || (this.year%400==0))) return true; else return false;
        }

        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="g_Calendar.selectChange();">';
                for (var i=0;i<this.months.length;i++){
              tmpStr += '<option value="' + padZero(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: g_Calendar.changeMonth(-1);"><img name="calendar" src="images/down.gif" 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: g_Calendar.changeMonth(+1);"><img name="calendar" src="images/up.gif" 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">';
          tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td><a href="javascript: g_Calendar.changeYear(-1);"><img name="calendar" src="images/down.gif" 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: g_Calendar.changeYear(+1);"><img name="calendar" src="images/up.gif" width="8" height="12" border="0" alt=""></a></td></tr></table>'
          tmpStr += '</td>';
          tmpStr += '</tr>';
          tmpStr += '</table>';
          var iCount = 1;
          var iFirstDOM = this.getFirstDOM(); // 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<this.daysOfWeek.length;i++){
                  tmpStr += '<td align="center" class="calDaysColor">' + this.daysOfWeek[i] + '</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==1 || i==7) 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: g_Calendar.clickDay(' + padZero(iCount) + ');">' + padZero(iCount) + '</a>';
                         } else {
                           tmpStr += '<span class="disabled">' + padZero(iCount) + '</span>';
                         }
                         iCount++;
                   } else {
                     if  (i==1 || i==7) tmpStr += 'class="calWeekend"';
                         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){
           var tmp = eval('document.' + this.target);
           if (this.dateFormat=='dd-mmm-yyyy') tmp.value = padZero(day) + this.dateDelim + this.months[this.month].substr(0,3) + this.dateDelim + this.year;
           if (this.dateFormat=='dd/mm/yyyy') tmp.value =  padZero(day) + this.dateDelim + padZero(this.month+1) + this.dateDelim + this.year;
           if (this.dateFormat=='mm/dd/yyyy') tmp.value =  padZero(this.month+1) + this.dateDelim + padZero(day) + this.dateDelim + this.year;
           if (this.dateFormat=='yyyy/mm/dd' || this.dateFormat=='yyyy-mm-dd') tmp.value =  this.year + this.dateDelim + padZero(this.month+1) + this.dateDelim + padZero(day);

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

        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, pos, 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':
            this.dateDelim = '-';
                break;
          case 'dd/mm/yyyy':
            this.dateDelim = '/';
                break;
          case 'mm/dd/yyyy':
            this.dateDelim = '/';
                break;
          case 'yyyy/mm/dd':
            this.dateDelim = '/';
          case 'yyyy-mm-dd':
            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;
          }

          //position of de calendar
          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;

           if (pos=='left') {
                this.containerLayer.style.left = x-130;
                if (event.y>0)this.containerLayer.style.top = y+20; }
           else {
                this.containerLayer.style.left = x+20;
                if (event.y>0)this.containerLayer.style.top = y; }
          }
          if (browser.ns6){
             if (pos=='left') {
                this.containerLayer.style.left = event.pageX-130;
                this.containerLayer.style.top = event.pageY+10; }
             else {
                this.containerLayer.style.left = event.pageX+10;
                this.containerLayer.style.top = event.pageY-10; }
          }
          this.target = target;
          var tmp = eval('document.' + this.target);
          if (tmp && tmp.value && tmp.value.split(this.dateDelim).length==3){
            var atmp = tmp.value.split(this.dateDelim)
            this.day = this.oDay = this.dateFormat.substr(0,2)=='dd'?parseInt(atmp[0],0):parseInt(atmp[1],0);
            if (this.dateFormat=='yyyy/mm/dd' || this.dateFormat=='yyyy-mm-dd'){
                this.day = this.oDay = parseInt(atmp[2],0);
                this.month = this.oMonth = parseInt(atmp[1]-1,0);
                this.year= this.oYear = parseInt(atmp[0],10);
            } else {
                if (this.dateFormat=='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;
                    }
                  }
                } else {
                  if (this.dateFormat.substr(0,2)=='dd') this.month = this.oMonth = parseInt(atmp[1]-1,0);
                  else this.month = this.oMonth = parseInt(atmp[0]-1,0);
                }
                this.year= this.oYear = parseInt(atmp[2],10);
            }
          } 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';
          }
        }

        // events capturing
        window.onload=doCalendar;
        window.document.onclick=handleDocumentClick

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

          if (browser.ns6){
            var bTest = (e.pageX > parseInt(g_Calendar.containerLayer.style.left,10) && e.pageX <  (parseInt(g_Calendar.containerLayer.style.left,10)+125) && e.pageY < (parseInt(g_Calendar.containerLayer.style.top,10)+125) && e.pageY > parseInt(g_Calendar.containerLayer.style.top,10));
            if (e.target.name!='imgCalendar' && e.target.name!='month'  && e.target.name!='year' && e.target.name!='calendar' && !bTest){
                  g_Calendar.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(g_Calendar.containerLayer.style.left,10) && e.x <  (parseInt(g_Calendar.containerLayer.style.left,10)+125) && e.y < (parseInt(g_Calendar.containerLayer.style.top,10)+125) && e.y > parseInt(g_Calendar.containerLayer.style.top,10));
            if (e.srcElement.name!='imgCalendar' && e.srcElement.name!='month' && e.srcElement.name!='year' && !bTest & typeof(e.srcElement)!='object'){
                  g_Calendar.hide();
                }
          }
          if (browser.ns4) g_Calendar.hide();
        }
        function doCalendar(){
           //var aCalendar = new Calendar(new Date(2001,1,13));
           var aCalendar = new Calendar(new Date());
        }
        // utility function
        function padZero(num) {
          return ((num <= 9) ? ("0" + num) : num);
        }
        /** adapted from http://tech.irt.org/articles/js052/index.htm */

        function addDays(startDate,addition) {

                var accumulate    = new Array(0,31, 59, 90,120,151,181,212,243,273,304,334);
                var accumulateLY  = new Array(0,31, 60, 91,121,152,182,213,244,274,305,335);

            var year = startDate.getFullYear();
                var month = startDate.getMonth();
                var day = startDate.getDate();

                if (isLeapYear(year)) var number = day + accumulateLY[month] + addition;
            else                var number = day + accumulate[month]   + addition;
            var days = daysinyear(year);

            while (number > days) {
                number -= days;
                days = daysinyear(++year);
            }

            while (number < 1) {
                days = daysinyear(--year);
                number += days;
            }

            month = 0;

            if (isLeapYear(year)) {
                while (number > accumulateLY[month]) { month++; }
                day = number - accumulateLY[--month];
            }
            else {
                while (number > accumulate[month]) { month++; }
                day = number - accumulate[--month];
            }
                return new Date(year,month,day);
        }

        function daysinyear(year) { if (isLeapYear(year)) return 366; else return 365; }
        function isLeapYear(year) { if (year%4==0 && ((year%100!=0) || (year%400==0))) return true; else return false; }
        /* end of adaptation */