I have Jquery for calender control ,it is working  upto IE8 but in IE11 it's not working 
please see the below code what i am using now could please give the solution it is very helpful to me 
  <script language="javascript" src="../Resources/Script/Calendar.js" type="text/javascript"></script> 
var activeElements = new Array();
var activeElementCount = 0;
var calContainer;
function leapYear(year)
{
	if((year%4)==0)
	{
		return true;
	}
	else
	{ 
		return false; 
	}
}
function checkDay(digit)
{  
	if(digit < 10)
	{
		return "0" + digit;	
	}
	else
	{ 
		return digit;
	}
}
function checkMonth(month)
{
	if(month < 10)
	{
		return "0" + month;
	}
	else
	{ 
		return month;
	}
}
function getDays(month, year) 
{
	var ar = new Array(12);
	ar[0] = 31;
	ar[1] = (leapYear(year)) ? 29 : 28;
	ar[2] = 31;
	ar[3] = 30;
	ar[4] = 31;
	ar[5] = 30;
	ar[6] = 31;
	ar[7] = 31;
	ar[8] = 30;
	ar[9] = 31;
	ar[10] = 30;
	ar[11] = 31;
	return ar[month];
};
var ar = new Array(12);
ar[0] = "January";
ar[1] = "February";
ar[2] = "March";
ar[3] = "April";
ar[4] = "May";
ar[5] = "June";
ar[6] = "July";
ar[7] = "August";
ar[8] = "September";
ar[9] = "October";
ar[10] = "November";
ar[11] = "December";
function getMonthName(month) 
{
	return ar[month]
}
function setCal(mont, referenceObj, calendarDateFormat, calendarDateFieldSeperator, calendarBackColor, textBoxID) 
{
	var now = new Date();
	var nmont=now.getMonth();
	var nyear = now.getYear();
	now.setDate(1);
	now.setMonth((nmont+mont));
	
	var year = now.getYear();
	
	if (year < 1000) 
		year+=1900;
		
	var month = now.getMonth();
	var monthName = getMonthName(month);
	var date = now.getDate();
	now = null;
	
	var firstDayInstance = new Date(year, month, 1);
	var firstDay = firstDayInstance.getDay();
	firstDayInstance = null;
	var days = getDays(month, year);
	return (drawCal(firstDay + 1, days, date, monthName, month, nmont, nyear, year, mont, month, referenceObj, calendarDateFormat, calendarDateFieldSeperator, calendarBackColor, textBoxID))
}
function drawCal(firstDay, lastDate, date, monthName, monthnum, nmont, nyear, year, mont, month, referenceObj, calendarDateFormat, calendarDateFieldSeperator, calendarBackColor, textBoxID) 
{
	var headerHeight = 4;
	var border = 0;
	var cellspacing = 0;
	var headerColor = "#C93900";               
	var headerSize = "";
	var colWidth = 0;
	var dayCellHeight = 8;
	var dayColor =  "ffffff";   
	var cellHeight = 0;
//	alert(calendarBackColor)
	var todayColor =  calendarBackColor;
	var timeColor = "purple";
	//var allmonths='<select style=BORDER: #ECD297 1px solid; FONT-WEIGHT: normal; FONT-SIZE: 5px;font-style: normal; COLOR: #000000; FONT-FAMILY: Tahoma, Arial, Helvetica, sans-serif; BACKGROUND-COLOR:#ECD297; border: #CCCC99; name=\"mont\" onchange=\"window.top.frames[3].tom((this.options[this.selectedIndex].value-('+(nmont+((nyear-year)*12))+') ), \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');">';
	var allmonths='<select style="BORDER: #444444 1px solid; FONT-SIZE: 11px; FONT-FAMILY: Tahoma, Arial, Helvetica, sans-serif; font-weight: normal; text-decoration: none; background-color: #ffffff; font-style: normal; vertical-align: middle; color:#000000;" name=\"mont\" onchange=\"window.top.frames[3].tom((this.options[this.selectedIndex].value-('+(nmont+((nyear-year)*12))+') ), \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');">';
	for (i=0; i<ar.length; i++)
	{	
		allmonths=allmonths+'<option value='+i;
		if (i==monthnum)
			allmonths=allmonths+' selected';allmonths=allmonths+'>'+ar[i]+'</option>';
	}
		allmonths=allmonths+'</select>';
		var text = '';
		text += '<center>';text += '<table border=1 cellspacing=0 bgcolor="' + calendarBackColor + '" >';
		text += '<tr><th height=' + headerHeight + ' bgcolor=#C93900 align=Left><table border=0 width=100%><tr><th height=' + headerHeight + ' bgcolor=#C93900 align=Left><font face=\'Verdana\' size=2 color=#ffffff>Payment Processor</font></th><th height=' + headerHeight + ' bgcolor=#C93900 align=right><a href="" onclick="window.top.frames[3].document.getElementById(\'iFrameCalendar\').style.visibility=\'hidden\';return false;"><font color="#ffffff" face=\'Verdana\' size=2><B>x</B></font></A>  </th></tr></table></th></tr>';		
		text += '<tr><td>';
		text += '<TABLE BORDER=1 CELLSPACING=' + cellspacing + '  bgcolor="#E9C085">';
		text += '<tr  bgcolor="#FEF4D3"><th colspan=7 HEIGHT=' + headerHeight + '  bgcolor="#FEF4D3" >';
		text += '<table width=100%> <tr>';
		text += '<td  style="FONT-SIZE: 12px;"><A style="text-decoration:none;" HREF="javascript:window.top.frames[3].tom('+(mont-1)+', \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');"><font color="#C93900" face=\'Verdana\' size=1><B><</B></font></A> ';
		text += allmonths + ' <A style="text-decoration:none;" HREF="javascript:window.top.frames[3].tom('+(mont+1)+', \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');"><font color="#C93900" face=\'Verdana\' size=1><B>></B></font></A> ';
		text += '</td><td align=right height="5" style="FONT-SIZE: 12px;">';
		text += '  <A style="text-decoration:none;" HREF="javascript:window.top.frames[3].tom('+(mont-12)+', \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');"><font color="#C93900" face=\'Verdana\' size=1><B><</B></font></A> <input type=text style="BORDER-RIGHT: #333333 1px solid; BORDER-TOP: #333333 1px solid; FONT-SIZE: 10px; BORDER-LEFT: #333333 1px solid; COLOR: #000000; BORDER-BOTTOM: #333333 1px solid; FONT-FAMILY: Verdana, Arial; BACKGROUND-COLOR: #faf9f5" name="y_year" size="5" maxlength=4 value='+year+' onblur="if(!Number(this.value) || this.value.length<1) {alert (\'Improper Year\'); this.focus(); return false;} window.top.frames[3].tom((12*(this.value-'+nyear+'))+('+mont%12+'), \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');"> <A style="text-decoration:none;" HREF="javascript:window.top.frames[3].tom('+(mont+12)+', \''+referenceObj+'\',\''+calendarDateFormat+'\',\''+calendarDateFieldSeperator+'\',\''+calendarBackColor+'\',\''+textBoxID+'\');" ><font color="#C93900" face=\'Verdana\' size=1><B>></B></font></A>';
		text += '</FONT></td>';text += '';
		text += ' </tr></table>';
		text += '</TH></tr>';
	
		
		var openCol = '<TD width=9 height=9 bgcolor="#FEF4D3">';
		openCol += '<FONT face=\'Verdana\' size=1 COLOR=\'red\'">';
		var closeCol = '</FONT></TD>';
		var weekDay = new Array(7);
		
		weekDay[0] = "Sun";
		weekDay[1] = "Mon";
		weekDay[2] = "Tue";
		weekDay[3] = "Wed";
		weekDay[4] = "Thu";
		weekDay[5] = "Fri";
		weekDay[6] = "Sat";
		
		text += '<TR ALIGN="center" valign="middle">';
		for (var dayNum = 0; dayNum < 7; ++dayNum) 
		{
			text += openCol + weekDay[dayNum] + closeCol;
		}
		
		text += '</TR>';
		
		var digit = 1;
		var curCell = 1;
		
		for (var row = 1; row <= Math.ceil((lastDate + firstDay - 1) / 7); ++row) 
		{
			text += '<TR ALIGN="right" VALIGN="top">';
			
			for (var col = 1; col <= 7; ++col) 
			{
				if (digit > lastDate) 
				{
					text += '<TD bgcolor="#FEF4D3"> </TD>';curCell++;
				}
				else if (curCell < firstDay) 
				{
					text += '<TD bgcolor="#FEF4D3"> </TD>';
					curCell++;
				} 
				else 
				{
					var d= new Date();
					
					if ((digit == d.getDate()) && (month==d.getMonth()) && ( year==((d.getYear(year)>1000) ? d.getYear(year) : d.getYear(year)+1000))) 
					{
						text += '<TD bgcolor="#FEF4D3" HEIGHT=' + cellHeight + '>';
											
						if(calendarDateFormat=='MMDDYYYY')
						    text += '<a href="" onclick="window.top.frames[3].document.getElementById(\'' + textBoxID + '\').value=\'' + (month + 1) + '\\' + calendarDateFieldSeperator + digit + '\\' + calendarDateFieldSeperator + year + '\';window.top.frames[3].document.getElementById(\'iFrameCalendar\').style.visibility=\'hidden\';window.top.frames[3].document.getElementById(\'' + textBoxID + '\').focus();return false;"><FONT face=\'Verdana\' size=1 COLOR="' + todayColor + '"><b>'; 
						else
						    text += '<a href="" onclick="window.top.frames[3].document.getElementById(\'' + textBoxID + '\').value=\'' + (checkDay(digit)) + '\\' + calendarDateFieldSeperator + (checkMonth(month + 1)) + '\\' + calendarDateFieldSeperator + year + '\';window.top.frames[3].document.getElementById(\'iFrameCalendar\').style.visibility=\'hidden\';window.top.frames[3].document.getElementById(\'' + textBoxID + '\').focus();return false;"><FONT face=\'Verdana\' size=1 COLOR="' + todayColor + '"><b>';
							
							text += digit;
							text += '</FONT></a>';
							text += ' </TD>';
						} 
						else
						{
							if(calendarDateFormat=='MMDDYYYY')
							    text += '<TD bgcolor="#FEF4D3" HEIGHT=' + cellHeight + '><a href="" onclick="window.top.frames[3].document.getElementById(\'' + textBoxID + '\').value=\'' + (month + 1) + '\\' + calendarDateFieldSeperator + digit + '\\' + calendarDateFieldSeperator + year + '\';window.top.frames[3].document.getElementById(\'iFrameCalendar\').style.visibility=\'hidden\';window.top.frames[3].document.getElementById(\'' + textBoxID + '\').focus();return false;"><font color=black face=\'Verdana\' size=1 >'; 
							else
							    text += '<TD bgcolor="#FEF4D3" HEIGHT=' + cellHeight + '><a href="" onclick="window.top.frames[3].document.getElementById(\'' + textBoxID + '\').value=\'' + (checkDay(digit)) + '\\' + calendarDateFieldSeperator + (checkMonth(month + 1)) + '\\' + calendarDateFieldSeperator + year + '\';window.top.frames[3].document.getElementById(\'iFrameCalendar\').style.visibility=\'hidden\';window.top.frames[3].document.getElementById(\'' + textBoxID + '\').focus();return false;"><font color=black face=\'Verdana\' size=1 >';
								text += digit + '</font></a> </TD>';
						}
						
						digit++;
					}
				}
					text += '</TR>';
			}
			text += '</TABLE>';
			text += '</td></tr></table>';
			text += '</CENTER>';
				return(text);
		}
						
					function tom(mont,referenceObj, calendarDateFormat, calendarDateFieldSeperator, calendarBackColor, textBoxID)
					{
							var screenHeight = screen.availHeight;
							var screenWidth = screen.availWidth;
							var objectPosX = findPosX(document.getElementById(referenceObj));
							var objectPosY = findPosY(document.getElementById(referenceObj));
							var objectWidth = document.getElementById(referenceObj).width;
							if(!document.getElementById('iFrameCalendar'))
							{
								var objCalendar = document.createElement('<iframe id="iFrameCalendar" style="width:200px;height:220px;position:absolute;display:none;" frameborder=0 scrolling=no marginwidth=0 src="" marginheight=0></iframe>');
								document.body.appendChild(objCalendar);
							}
			
							calContainer = document.getElementById('iFrameCalendar');
							calContainer.style.top = objectPosY  + 'px';
							calContainer.style.left = objectPosX + objectWidth + 'px';
							calContainer.style.display = "block";
							copyContent(setCal(mont, referenceObj, calendarDateFormat, calendarDateFieldSeperator, calendarBackColor,textBoxID));
							calContainer.style.visibility = "visible";
					}
			function findPosX(obj)
			{
				var curleft = 0;
				if (obj.offsetParent)
				{
					while (obj.offsetParent)
					{
					curleft += obj.offsetLeft;obj = obj.offsetParent;
					}
				}
				else if (obj.x)curleft += obj.x;return curleft;
			}
			function findPosY(obj)
			{
				var curtop = 0;
				if (obj.offsetParent)
				{
					while (obj.offsetParent)
					{
						curtop += obj.offsetTop;obj = obj.offsetParent;
					}
				}
				else if (obj.y)curtop += obj.y;return curtop;
			}
			function copyContent(strContent)
			{
				var iFrameContent = "<html><body topmargin='0' leftmargin='0' rightmargin='0' bgColor='#FEF4D3'><div id='divCalendar'>%message%</div></body></html>";
				var newContent = iFrameContent.replace(/\%message\%/, strContent);
				var doc = getIFrameDoc();doc.open();doc.write(newContent);doc.close();
			}
			
			function getIFrameDoc()
			{
			var iFrame = document.getElementById("iFrameCalendar");
			var doc = iFrame.contentDocument;
			   
			if (doc == undefined)doc = iFrame.contentWindow.document;
				return doc;
}
 
<asp:TextBox ID="txtFromDate" runat="server" Width="100px" onkeydown="return false;"></asp:TextBox>
                                                    <img id="imgCal" onclick="tom(0, 'imgCal', 'DDMMYYYY', '/', '#b9b99e', 'txtFromDate');"
                                                        height="14" src="../Resources/Images/icon_Cal.gif" width="12" align="absMiddle" />