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;
      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 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>";

    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';
          }

          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>";
    }

    table = table + "<tr class='header'><th colspan='7' style='padding: 3px;'><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;

    if(document.getElementById){

      calendar = document.getElementById(calendarId);
      calendar.innerHTML = calendarDrawTable(currentYear, currentMonth);

      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+155;
      y=y-22;
      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');
    }
  }

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

var calendarControl = new CalendarControl();

function showCalendarControl(textField) {
  calendarControl.show(textField);
}

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

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

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

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

function getCalendar(evnX,evnY,objName,identifyPosition)
{	
    
	window.dateField = document.getElementById(objName);	
	
	if(identifyPosition =='F')
	{		
		var strProperty = "dialogLeft:"+(evnX-100)+"px;dialogTop:"+(evnY+40)+"px;dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}
	
	
	else if(identifyPosition =='T')
	{		
		var strProperty = "dialogLeft:"+(evnX-30)+"px;dialogTop:"+(evnY+40)+"px;dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}
	else
	{
		var strProperty = "dialogLeft:"+(evnX-225)+"px;dialogTop:"+(evnY+117)+";dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}
	
	
	var objReturnval = window.showModalDialog('../Calendar.htm',top,strProperty);

	if(objReturnval != undefined)
	{
		
		document.getElementById(objName).innerText = objReturnval;
	    
		document.getElementById(objName).focus();
	}
	else
	{
		document.getElementById(objName).innerText = "";
	}
	
}

function getCalendar(evnX,evnY,objDate,objMonth,objYear,identifyPosition)
{	
	window.dateField = document.getElementById(objYear);	
	
	if(identifyPosition =='F')
	{		
		var strProperty = "dialogLeft:"+(evnX)+"px;dialogTop:"+(evnY+130)+"px;dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}	
	
	else if(identifyPosition =='T')
	{		
		var strProperty = "dialogLeft:"+(evnX-30)+"px;dialogTop:"+(evnY+40)+"px;dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}
	else
	{
		var strProperty = "dialogLeft:"+(evnX-225)+"px;dialogTop:"+(evnY+117)+";dialogHeight:175px;dialogWidth:230px;status:no;help:no;scroll=no"
	}
	
	var objReturnval = window.showModalDialog('../Calendar.htm',top,strProperty);

	if(objReturnval != undefined)
	{
		
		
		
		ArrSelectedDate = new Array();
		ArrSelectedDate = objReturnval.split("-");
		
		document.getElementById(objDate).value = ArrSelectedDate[0].toString();
		document.getElementById(objMonth).value = ArrSelectedDate[1].toString();
		document.getElementById(objYear).value = ArrSelectedDate[2].toString();
	    
	}

}
// Function to check difference between two given days 
function dateDiff()
{
	var n1 = formatDate(document.getElementById("txtFromDate").value);
	var n2 = formatDate(document.getElementById("txtToDate").value);
	alert(n1);
	alert(n2);
	if (n1 !='' && n2 !='')
	{
		var date1 = new Date();
		var date2 = new Date();
		var diff  = new Date();

		date1temp = new Date(n1);
		date1.setTime(date1temp.getTime());

		date2temp = new Date(n2);
		date2.setTime(date2temp.getTime());

		diff.setTime(date2.getTime() - date1.getTime());
		days = Math.floor(diff / (1000 * 60 * 60 * 24)); 
		if(days<0)
		{
			alert('Please enter valid dates.');

		} 
	}	
}

// Function to check difference between two given days 
function dateDiff(objFromDate,objToDate)
{
alert(document.getElementById(objFromDate).innerText);


}

function formatDate(strDate)
{
	if (strDate != '')
	{
		var arrayDate = new Array();
		arrayDate = strDate.split("-");
		var arrShMonth = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
		var mon = 0 ;
		for (mon=0; mon< 12 ; mon++)
		{
			if (arrayDate[1].toUpperCase() == arrShMonth[mon].toUpperCase())
			break ;
		}
		strDate = (mon+1) +"/" +arrayDate[0] +"/" + arrayDate[2];
	}
	alert(strDate);
	return strDate ;
}	
	
function converMonth(mon,nubmerOrCharacter)
{				
	var arrShMonth = new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec");
	var numMonth;
	
	if(nubmerOrCharacter=="Number")
	{
		for ( var i=0 ; i<12 ; i++)
			if(mon==arrShMonth[i]){convertedMonth = i+1; break;} 
	
			}else if(nubmerOrCharacter=="Character")
					convertedMonth = arrShMonth[eval(mon)];
	
	return convertedMonth;
}