function DateFormat(vDateName, vDateValue, e, dateCheck, dateType) {
var dateType=3;
var isNav4 = false, isNav5 = false, isIE4 = false
var strSeperator = "/"; 
// If you are using any Java validation on the back side you will want to use the / because 
// Java date validations do not recognize the dash as a valid date separator.
var vDateType = 3; // Global value for type of date format
//                1 = mm/dd/yyyy
//                2 = yyyy/dd/mm  (Unable to do date check at this time)
//                3 = dd/mm/yyyy
var vYearType = 4; //Set to 2 or 4 for number of digits in the year for Netscape
var vYearLength = 4; // Set to 4 if you want to force the user to enter 4 digits for the year before validating.
var err = 0; // Set the error code to a default of zero
vDateType = dateType;
// vDateName = object name
// vDateValue = value in the field being checked
// e = event
// dateCheck
// True  = Verify that the vDateValue is a valid date
// False = Format values being entered into vDateValue only
// vDateType
// 1 = mm/dd/yyyy
// 2 = yyyy/mm/dd
// 3 = dd/mm/yyyy
//Enter a tilde sign for the first number and you can check the variable information.

//if (vDateValue == "~") {
//alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
//vDateName.value = "";
//vDateName.focus();
//return true;
//}

var whichCode = (window.Event) ? e.which : e.keyCode;
// Following written by Kishore.
var copPaste = false;
if (e.ctrlKey && (e.keyCode==67 || e.keyCode==86))
{
	copPaste = true;
}

// Check to see if a seperator is already present.
// bypass the date if a seperator is present and the length greater than 8
//if (vDateValue.length > 8 && isNav4) {
//if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1))
//return true;
//}

//Eliminate all the ASCII codes that are not valid
var intChk;
var strChk;
//var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-+*&@!#$%^(){}[]';:?><.~=`_,|";
var alphaCheck = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ `~!@#$%^&*()_+|\\=-[]{};:',.<>?\"";

for(intChk = 0; intChk < vDateValue.length; intChk++)
{
	strChk = vDateValue.substr(intChk,1);
	if (alphaCheck.indexOf(strChk) >= 0)
	{
		if (isNav4)
		{
			//vDateName.value = "";
			vDateName.focus();
			vDateName.select();
			return false;
		}
		else
		{
/*			var intConvert = parseInt(vDateName.value,10)
			if(isNaN(intConvert))
			{
				//vDateName.value = "";
				alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
				vDateName.value = vDateName.value.replace(strChk,'');
				vDateName.focus();
				vDateName.select();
				return false;
			}
			else
			{*/
				vDateName.value = vDateName.value.replace(strChk,'');
				//vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
//			}

//vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));

		}
	}
}

//Commented By Sachin
/*if (alphaCheck.indexOf(vDateValue) >= 1) {

if (isNav4) {
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}

else {
vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
return false;
   }
 
}*/

//
//if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
// IE has value and skip for backspace,Delete,End,Home,left arrow and right Arrow, C key & V Key (By Kishore)
if (whichCode == 8 || whichCode == 46 || whichCode == 35 || whichCode == 36 || whichCode == 37 || whichCode == 39 || whichCode == 17 || copPaste==true)
return false;
else {
//Create numeric string values for 0123456789/
//The codes provided include both keyboard and keypad values
var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
if (strCheck.indexOf(whichCode) != -1)
{
	if (isNav4)
	{
		if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1))
		{
			alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
			//vDateName.value = "";
			vDateName.focus();
			vDateName.select();
			return false;
		}
		if (vDateValue.length == 6 && dateCheck)
		{
			var mDay = vDateName.value.substr(2,2);
			var mMonth = vDateName.value.substr(0,2);
			var mYear = vDateName.value.substr(4,4)
			//Turn a two digit year into a 4 digit year
			if (mYear.length == 2 && vYearType == 4)
			{
				var mToday = new Date();
				//If the year is greater than 30 years from now use 19, otherwise use 20
				var checkYear = mToday.getFullYear() + 30; 
				var mCheckYear = '20' + mYear;
				if (mCheckYear >= checkYear)
					mYear = '19' + mYear;
				else
					mYear = '20' + mYear;
			}
			var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
			if (!dateValid(vDateValueCheck))
			{
				alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
				//vDateName.value = "";
				vDateName.focus();
				vDateName.select();
				return false;
			}
			return true;
		}
		else
		{
// Reformat the date for validation and set date type to a 1
if (vDateValue.length >= 8  && dateCheck) {
if (vDateType == 1) // mmddyyyy
{
var mDay = vDateName.value.substr(2,2);
var mMonth = vDateName.value.substr(0,2);
var mYear = vDateName.value.substr(4,4)
vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
}
if (vDateType == 2) // yyyymmdd
{
var mYear = vDateName.value.substr(0,4)
var mMonth = vDateName.value.substr(4,2);
var mDay = vDateName.value.substr(6,2);
vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
}
if (vDateType == 3) // ddmmyyyy
{
var mMonth = vDateName.value.substr(2,2);
var mDay = vDateName.value.substr(0,2);
var mYear = vDateName.value.substr(4,4)
vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
}
//Create a temporary variable for storing the DateType and change
//the DateType to a 1 for validation.
var vDateTypeTemp = vDateType;
vDateType = 1;
var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
if(mYear < 1900)
{
alert("Please Enter Year greater than 1899.");
vDateType = vDateTypeTemp;
//vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;

}
if (!dateValid(vDateValueCheck)) {
alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
vDateType = vDateTypeTemp;
//vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
vDateType = vDateTypeTemp;
return true;
}
else {
if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
//vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
         }
      }
   }
}
else {
// Non isNav Check
	if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1))
	{
		alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
		//vDateName.value = "";
		vDateName.focus();
		return true;
	}
	// Reformat date to format that can be validated. mm/dd/yyyy
	if (vDateValue.length >= 8 && dateCheck)
	{
	// Additional date formats can be entered here and parsed out to
	// a valid date format that the validation routine will recognize.


// Added by Kishore
		var strDateSplit;
		strDateSplit = vDateName.value.split(strSeperator);
// End of addition

		if (strDateSplit.length != 3)
		{
			alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
			//vDateName.value = "";
			vDateName.focus();
			vDateName.select();
			return false;
		}
		
		if (vDateType == 1) // mm/dd/yyyy
		{
			var mMonth = strDateSplit[0];
			var mDay = strDateSplit[1];
			var mYear = strDateSplit[2];

/*
			var mMonth = vDateName.value.substr(0,2);
			var mDay = vDateName.value.substr(3,2);
			var mYear = vDateName.value.substr(6,4)*/
		}
		if (vDateType == 2) // yyyy/mm/dd
		{
			var mYear = strDateSplit[0];
			var mMonth = strDateSplit[1];
			var mDay = strDateSplit[2];

/*			var mYear = vDateName.value.substr(0,4)
			var mMonth = vDateName.value.substr(5,2);
			var mDay = vDateName.value.substr(8,2);*/
		}
		if (vDateType == 3) // dd/mm/yyyy
		{

			var mDay = strDateSplit[0];
			var mMonth = strDateSplit[1];
			var mYear = strDateSplit[2];

/*			var mDay = vDateName.value.substr(0,2);
			var mMonth = vDateName.value.substr(3,2);
			var mYear = vDateName.value.substr(6,4)*/
		}
		if(mYear < 1900)
		{
			alert("Please Enter Year greater than 1899.");
			vDateType = vDateTypeTemp;
			//vDateName.value = "";
			vDateName.focus();
			vDateName.select();
			return false;
		}

		if (vYearLength == 4)
		{
			if (mYear.length < 4 || strDateSplit.length != 3)
			{
				alert("Invalid Year! Please Enter Date in DD/MM/YYYY Format");
				//vDateName.value = "";
				vDateName.focus();
				return true;
			}
		}
// Create temp. variable for storing the current vDateType
		var vDateTypeTemp = vDateType;
// Change vDateType to a 1 for standard date format for validation
// Type will be changed back when validation is completed.
		vDateType = 1;
// Store reformatted date to new variable for validation.
		var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
		if (mYear.length == 2 && vYearType == 4 && dateCheck)
		{
//Turn a two digit year into a 4 digit year
			var mToday = new Date();
//If the year is greater than 30 years from now use 19, otherwise use 20
			var checkYear = mToday.getFullYear() + 30; 
			var mCheckYear = '20' + mYear;
			if (mCheckYear >= checkYear)
				mYear = '19' + mYear;
			else
				mYear = '20' + mYear;
			vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
// Store the new value back to the field.  This function will
// not work with date type of 2 since the year is entered first.
			if (vDateTypeTemp == 1) // mm/dd/yyyy
				vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
			if (vDateTypeTemp == 3) // dd/mm/yyyy
				vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
		} 
		if (!dateValid(vDateValueCheck))
		{
			alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
			vDateType = vDateTypeTemp;
			//vDateName.value = "";
			vDateName.focus();
			return true;
		}
		vDateType = vDateTypeTemp;
		return true;
	}
	else
	{
		if (vDateType == 1)
		{
			if (vDateValue.length == 2)
			{
				vDateName.value = vDateValue+strSeperator;
			}
			if (vDateValue.length == 5)
			{
				vDateName.value = vDateValue+strSeperator;
			}
		}
	
		if (vDateType == 2)
		{
			if (vDateValue.length == 4)
			{
				vDateName.value = vDateValue+strSeperator;
			}
			if (vDateValue.length == 7)
			{
				vDateName.value = vDateValue+strSeperator;
			}
		} 
		if (vDateType == 3)
		{
			if (vDateValue.length == 2)
			{
				vDateName.value = vDateValue+strSeperator;
			}
			if (vDateValue.length == 5)
			{
				vDateName.value = vDateValue+strSeperator;
			}
		}
		return true;
   }
}

if (vDateValue.length == 10&& dateCheck) {
if (!dateValid(vDateName)) {
// Un-comment the next line of code for debugging the dateValid() function error messages
//alert(err);  
alert("Invalid Date! Please Enter Date in DD/MM/YYYY Format");
vDateName.focus();
vDateName.select();
   }
}
return false;
}
else {
// If the value is not in the string return the string minus the last
// key entered.
if (isNav4) {
//vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
else
{
// Check this. Commented for not reducing the string by one charecter (Kishore)
//vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
return false;
         }
      }
   }
}


function dateValid(objName) {
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
// var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
//strDate = datefield.value;
strDate = objName;
if (strDate.length < 1) {
	return true;
	}
for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++)
{
	if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1)
	{
		strDateArray = strDate.split(strSeparatorArray[intElementNr]);
		if (strDateArray.length != 3) {
			err = 1;
			return false;
		}
		else
		{
			strDay = strDateArray[0];
			strMonth = strDateArray[1];
			strYear = strDateArray[2];
		}
		booFound = true;
	}
}
if (booFound == false) 
{
	if (strDate.length>5) {
		
		strDay = strDate.substr(0, 2);
		strMonth = strDate.substr(2, 2);
		strYear = strDate.substr(4);
	}
}
//Adjustment for short years entered
if (strYear.length == 2) {
strYear = '20' + strYear;
}
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
   }
}
else {
if (intday > 28) {
err = 10;
return false;
      }
   }
}
return true;
}
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}