function positionInfo(object) {

  var p_elm = object;

  this.getElementLeft = getElementLeft;
  function getElementLeft() {
    var x = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      x+= elm.offsetLeft;
      elm = elm.offsetParent;
    }
    return parseInt(x);
  }

  this.getElementWidth = getElementWidth;
  function getElementWidth(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetWidth);
  }

  this.getElementRight = getElementRight;
  function getElementRight(){
    return getElementLeft(p_elm) + getElementWidth(p_elm);
  }

  this.getElementTop = getElementTop;
  function getElementTop() {
    var y = 0;
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    while (elm != null) {
      y+= elm.offsetTop;
      elm = elm.offsetParent;
    }
    return parseInt(y);
  }

  this.getElementHeight = getElementHeight;
  function getElementHeight(){
    var elm;
    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    return parseInt(elm.offsetHeight);
  }

  this.getElementBottom = getElementBottom;
  function getElementBottom(){
    return getElementTop(p_elm) + getElementHeight(p_elm);
  }
}

function CalendarControl() {

  var calendarId = 'CalendarControl';
  var currentYear = 0;
  var currentMonth = 0;
  var currentDay = 0;

  var selectedYear = 0;
  var selectedMonth = 0;
  var selectedDay = 0;

  var months = ['January','February','March','April','May','June','July','August','September','October','November','December'];
  var dateField = null;

  function getProperty(p_property){
    var p_elm = calendarId;
    var elm = null;

    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if (elm != null){
      if(elm.style){
        elm = elm.style;
        if(elm[p_property]){
          return elm[p_property];
        } else {
          return null;
        }
      } else {
        return null;
      }
    }
  }

  function setElementProperty(p_property, p_value, p_elmId){
    var p_elm = p_elmId;
    var elm = null;

    if(typeof(p_elm) == "object"){
      elm = p_elm;
    } else {
      elm = document.getElementById(p_elm);
    }
    if((elm != null) && (elm.style != null)){
      elm = elm.style;
      elm[ p_property ] = p_value;
    }
  }

  function setProperty(p_property, p_value) {
    setElementProperty(p_property, p_value, calendarId);
  }

  function getDaysInMonth(year, month) {
    return [31,((!(year % 4 ) && ( (year % 100 ) || !( year % 400 ) ))?29:28),31,30,31,30,31,31,30,31,30,31][month-1];
  }

  function getDayOfWeek(year, month, day) {
    var date = new Date(year,month-1,day)
    return date.getDay();
  }

  this.setDate = setDate;
  function setDate(year, month, day) {
    if (dateField) {
      if (month < 10) {month = "0" + month;}
      if (day < 10) {day = "0" + day;}

      var dateString = month+"-"+day+"-"+year;
      dateField.value = dateString;
        if (dateField.id=='ctl00_ContentPlaceHolder1_ucFilter_txtSemStartDate' || dateField.id=='ctl00_ContentPlaceHolder1_ucFilter_txtSemEndDate')
         {         
              CallAjaxPageDate(this,'ctl00_ContentPlaceHolder1_ucFilter_ddwnExamType','ctl00_ContentPlaceHolder1_ucFilter_ddwnDept,ctl00_ContentPlaceHolder1_ucFilter_ddwnSem,ctl00_ContentPlaceHolder1_ucFilter_ddwnExamType,ctl00_ContentPlaceHolder1_ucFilter_ddwExam,ctl00_ContentPlaceHolder1_ucFilter_lstStudents,ctl00_ContentPlaceHolder1_btnRun,ctl00_ContentPlaceHolder1_ucFilter_rdbSelectStudentBy,ctl00_ContentPlaceHolder1_ucFilter_txtStartingWith,ctl00_ContentPlaceHolder1_btnSave,ctl00_ContentPlaceHolder1_btnPrint,ctl00_ContentPlaceHolder1_btnExport,ctl00_ContentPlaceHolder1_ucFilter_rdbReportType,ctl00_ContentPlaceHolder1_ucFilter_ddwnDisplay,ctl00_ContentPlaceHolder1_ucFilter_ddwnSortBy,ctl00_ContentPlaceHolder1_ucFilter_txtStartDate,ctl00_ContentPlaceHolder1_ucFilter_txtEndDate,ctl00_ContentPlaceHolder1_ucFilter_txtSemStartDate,ctl00_ContentPlaceHolder1_ucFilter_txtSemEndDate');
         }
        if (dateField.id=='ctl00_ContentPlaceHolder1_cdrTextBox_8' || dateField.id=='ctl00_ContentPlaceHolder1_cdrTextBox_12')
         {         
              CallAjaxPageDateSummary(this,'ctl00_ContentPlaceHolder1_lstListBox_15','ctl00_ContentPlaceHolder1_lstListBox_1,ctl00_ContentPlaceHolder1_lstListBox_3,ctl00_ContentPlaceHolder1_lstListBox_15,ctl00_ContentPlaceHolder1_cdrTextBox_8,ctl00_ContentPlaceHolder1_cdrTextBox_12');
         } 
	  if (dateField.id=='ctl00_ContentPlaceHolder1_ucFilter1_txtStartDate' || dateField.id=='ctl00_ContentPlaceHolder1_ucFilter1_txtEndDate')
         {        
              CallAjaxPageDateReport(this,'ctl00_ContentPlaceHolder1_ucFilter1_ddwnExamType','ctl00_ContentPlaceHolder1_ucFilter1_ddwnDept,ctl00_ContentPlaceHolder1_ucFilter1_ddwnExamType,ctl00_ContentPlaceHolder1_ucFilter1_ddwnExam,ctl00_ContentPlaceHolder1_ucFilter1_txtStartDate,ctl00_ContentPlaceHolder1_ucFilter1_txtEndDate');
         }
      hide();
    }
    return;
  }

  this.changeMonth = changeMonth;
  function changeMonth(change) {
    currentMonth += change;
    currentDay = 0;
    if(currentMonth > 12) {
      currentMonth = 1;
      currentYear++;
    } else if(currentMonth < 1) {
      currentMonth = 12;
      currentYear--;
    }

    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }

  this.changeYear = changeYear;
  function changeYear(change) {
    currentYear += change;
    currentDay = 0;
    calendar = document.getElementById(calendarId);
    calendar.innerHTML = calendarDrawTable();
  }

  function getCurrentYear() {
    var year = new Date().getYear();
    if(year < 1900) year += 1900;
    return year;
  }

  function getCurrentMonth() {
    return new Date().getMonth() + 1;
  } 

  function getCurrentDay() {
    return new Date().getDate();
  }


  /// Function Modified to disable the dates later than today to be disabled for issue no-0003567///  
  function calendarDrawTable() {
    var dayOfMonth = 1;
    var validDay = 0;
    var startDayOfWeek = getDayOfWeek(currentYear, currentMonth, dayOfMonth);
    var daysInMonth = getDaysInMonth(currentYear, currentMonth);
    var css_class = null; //CSS class for each day

    var table = "<table cellspacing='0' cellpadding='0' border='0'>";
    table = table + "<tr class='header'>";
    table = table + "  <td colspan='2' class='previous'><a href='javascript:changeCalendarControlMonth(-1);'>&lt;</a> <a href='javascript:changeCalendarControlYear(-1);'>&laquo;</a></td>";
    table = table + "  <td colspan='3' class='title'>" + months[currentMonth-1] + "<br>" + currentYear + "</td>";
    table = table + "  <td colspan='2' class='next'><a href='javascript:changeCalendarControlYear(1);'>&raquo;</a> <a href='javascript:changeCalendarControlMonth(1);'>&gt;</a></td>";
    table = table + "</tr>";
    table = table + "<tr><th>S</th><th>M</th><th>T</th><th>W</th><th>T</th><th>F</th><th>S</th></tr>";

    var now = new Date();
    var currentYearNew = parseInt(now.getFullYear());
    var currentMonthNew = parseInt(now.getMonth()+1);
    var currentDateNew = parseInt(now.getDate());
    var flagDisableDate = false;
      
    for(var week=0; week < 6; week++) {
      table = table + "<tr>";
      for(var dayOfWeek=0; dayOfWeek < 7; dayOfWeek++) {
        if(week == 0 && startDayOfWeek == dayOfWeek) {
          validDay = 1;
        } else if (validDay == 1 && dayOfMonth > daysInMonth) {
          validDay = 0;
        }

        if(validDay) {
          if (dayOfMonth == selectedDay && currentYear == selectedYear && currentMonth == selectedMonth) {
            css_class = 'current';
          } else if (dayOfWeek == 0 || dayOfWeek == 6) {
            css_class = 'weekend';
          } else {
            css_class = 'weekday';
          }
          
                 
          //////////////////////////////////////////////////////////////////
          //Code Added to make the dates after than today's as disabled////
          // This will be executed only in case of start date///////////

          if((dateField != null && dateField.id.indexOf('txtStartDate') >= 0) || (dateField != null && dateField.id.indexOf('txtEndDate') >= 0) || (dateField != null && dateField.id.indexOf('txtSemStartDate') >= 0) || (dateField != null && dateField.id.indexOf('txtSemEndDate') >= 0))
          { 
              if(currentYear > currentYearNew)
              {
                flagDisableDate = true;
              }
              else if(currentYear == currentYearNew)
              {
                if(currentMonth > currentMonthNew)
                {
                    flagDisableDate = true;
                }
                else if(currentMonth == currentMonthNew)
                {
                    if(dayOfMonth > currentDateNew)
                    {
                        flagDisableDate = true;
                    }
                }
              }
          
              if(flagDisableDate)
              {
                table = table + "<td><a disabled = 'true' class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
              }
              else
              {
                table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
              }
          }
          else
          {
            table = table + "<td><a class='"+css_class+"' href=\"javascript:setCalendarControlDate("+currentYear+","+currentMonth+","+dayOfMonth+")\">"+dayOfMonth+"</a></td>";
          }
          //////////////////////////////////////////////////////////////////  
          
                
          dayOfMonth++;
        } else {
          table = table + "<td class='empty'>&nbsp;</td>";
        }
      }
      table = table + "</tr>";
    }
    
 if (dateField.id =='ctl00_ContentPlaceHolder1_ucFilter_txtSemStartDate' || dateField.id=='ctl00_ContentPlaceHolder1_ucFilter_txtSemEndDate' || dateField.id=='ctl00_ContentPlaceHolder1_ucFilter1_txtStartDate' || dateField.id=='ctl00_ContentPlaceHolder1_ucFilter1_txtEndDate')
         {       
                  table = table + "<tr class='header'><th colspan='7' style='padding: 3px;'>&nbsp;&nbsp;&nbsp;<a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
         }
         else
         {
                     table = table + "<tr class='header'><th colspan='7' style='padding: 3px;'><a href='javascript:clearControlValue();'>Clear</a>&nbsp;&nbsp;&nbsp;&nbsp;<a href='javascript:hideCalendarControl();'>Close</a></td></tr>";
         }
        
   
    
    table = table + "</table>";

    return table;
  }

  this.show = show;
  function show(field) 
  {
        
        // If the calendar is visible and associated with
        // this field do not do anything.
        if (dateField == field) 
        {
          return;
        } else 
        {
          dateField = field;
        }

        if(dateField) 
        {
          try 
          {
            var dateString = new String(dateField.value);
            var dateParts = dateString.split("-");
            
            selectedMonth = parseInt(dateParts[0],10);
            selectedDay = parseInt(dateParts[1],10);
            selectedYear = parseInt(dateParts[2],10);
          } 
          catch(e) {}
        }

        if (!(selectedYear && selectedMonth && selectedDay)) 
        {
          selectedMonth = getCurrentMonth();
          selectedDay = getCurrentDay();
          selectedYear = getCurrentYear();
        }

        currentMonth = selectedMonth;
        currentDay = selectedDay;
        currentYear = selectedYear;

        try
        {
            if(document.getElementById)
            {
              calendar = document.getElementById(calendarId);
              calendar.innerHTML = '';
              
              var newdiv = document.createElement("divCalendar");
              newdiv.innerHTML = calendarDrawTable(currentYear, currentMonth);
   
              calendar.appendChild(newdiv);

              setElementProperty('display', 'block', 'CalendarControlIFrame');
              setProperty('display', 'block');

              var fieldPos = new positionInfo(dateField);
              var calendarPos = new positionInfo(calendarId);

              var x = fieldPos.getElementLeft();
              var y = fieldPos.getElementBottom();
              x=x+140;
              y=y-15;
              //x=x+130;
              //y=y-150;
              setProperty('left', x + "px");
              setProperty('top', y + "px");
              setElementProperty('left', x + "px", 'CalendarControlIFrame');
              setElementProperty('top', y + "px", 'CalendarControlIFrame');
              setElementProperty('width', calendarPos.getElementWidth() + "px", 'CalendarControlIFrame');
              setElementProperty('height', calendarPos.getElementHeight() + "px", 'CalendarControlIFrame');
             }
         }
         catch(e) {return false;}

  }

  this.clearControl = clearControl;
  function clearControl()
  {
     if(dateField) 
     {
      dateField.value = '';
     }
     hide();
  }


  this.hide = hide;
  function hide() {
    if(dateField) {
      setProperty('display', 'none');
      setElementProperty('display', 'none', 'CalendarControlIFrame');
      dateField = null;
    }
  }
}

var calendarControl = new CalendarControl();


function showCalendarControl(textField,textBoxId) {

  var index = textField.id.lastIndexOf("_"); 

  textField =  document.getElementById(textField.id.substring(0,index)+textBoxId);


  calendarControl.show(textField);
}


function hideCalendarControl() 
{
  calendarControl.hide();
}

  /// Function added to clear the textbox value on clear click/////  
  function clearControlValue()
  {
     calendarControl.clearControl();
  }

function setCalendarControlDate(year, month, day) {
  calendarControl.setDate(year, month, day);
}

function changeCalendarControlYear(change) {
  calendarControl.changeYear(change);
}

function changeCalendarControlMonth(change) {
  calendarControl.changeMonth(change);
}

document.write("<iframe id='CalendarControlIFrame' src='javascript:false;' frameBorder='0' scrolling='no'></iframe>");
//document.write("<div id='CalendarControl' name = 'CalendarControl'></div>");

// JScript File