// File Name  :FormCheck.js
//
// Functions are also provided to interactively check the
// above kinds of data and prompt the user if they have
// been entered incorrectly.
//
// BASIC DATA VALIDATION FUNCTIONS:
//
// isWhitespace (s)					Check whether string s is empty or whitespace.
// isLetter (c)					Check whether character c is an English letter 
// isDigit (c)						 Check whether character c is a digit 
// isLetterOrDigit (c)				Check whether character c is a letter or digit.
// isInteger (s [,eok])				True if all characters in string s are numbers.
// isSignedInteger (s [,eok])		True if all characters in string s are numbers; leading + or - allowed.
// isPositiveInteger (s [,eok])		 True if string s is an integer > 0.
// isNonnegativeInteger (s [,eok])		True if string s is an integer >= 0.
// isNegativeInteger (s [,eok])		 True if s is an integer < 0.
// isNonpositiveInteger (s [,eok])		True if s is an integer <= 0.
// isFloat (s [,eok])				 True if string s is an unsigned floating point (real) number. (Integers also OK.)
// isSignedFloat (s [,eok])			True if string s is a floating point number; leading + or - allowed. (Integers also OK.)
// isAlphabetic (s [,eok])			True if string s is English letters 
// isAlphanumeric (s [,eok])			 True if string s is English letters and numbers only.
// 
// isUSPhoneNumber (s [,eok])		True if string s is a valid U.S. Phone Number. 
// isInternationalPhoneNumber (s [,eok]) True if string s is a valid international phone number.
// isZIPCode (s [,eok])				True if string s is a valid U.S. ZIP code.
// isStateCode (s [,eok])			True if string s is a valid U.S. Postal Code
// isEmail (s [,eok])				 True if string s is a valid email address.
// isYear (s [,eok])					True if string s is a valid Year number.
// isIntegerInRange (s, a, b [,eok])  True if string s is an integer between a and b, inclusive.
// isMonth (s [,eok])				 True if string s is a valid month between 1 and 12.
// isDay (s [,eok])					True if string s is a valid day between 1 and 31.
// daysInFebruary (year)				Returns number of days in February of that year.
// isDate (year, month, day)			 True if string arguments form a valid date.
// FUNCTIONS TO REFORMAT DATA:
//
// stripCharsInBag (s, bag)			Removes all characters in string bag from string s.
// stripCharsNotInBag (s, bag)		Removes all characters NOT in string bag from string s.
// stripWhitespace (s)				Removes all whitespace characters from s.
// stripInitialWhitespace (s)		Removes initial (leading) whitespace characters from s.
// reformat (TARGETSTRING, STRING,		Function for inserting formatting characters or
//  INTEGER, STRING, INTEGER ... )		 delimiters into TARGETSTRING.									 
// reformatZIPCode (ZIPString)		If 9 digits, inserts separator hyphen.
// reformatUSPhone (USPhone)			 Reformats as (123) 456-789.
// FUNCTIONS TO PROMPT USER:
//
// prompt (s)						 Display prompt string s in status bar.
// promptEntry (s)					 Display data entry prompt string s in status bar.
// warnEmpty (theField, s)			Notify user that required field theField is empty.
// warnInvalid (theField, s)			 Notify user that contents of field theField are invalid.
// FUNCTIONS TO INTERACTIVELY CHECK FIELD CONTENTS:
//
// checkString (theField, s [,eok])  Check that theField.value is not empty or all whitespace.
// checkStateCode (theField)			 Check that theField.value is a valid U.S. state code.
// checkZIPCode (theField [,eok])	Check that theField.value is a valid ZIP code.
// checkUSPhone (theField [,eok])	Check that theField.value is a valid US Phone.
// checkInternationalPhone (theField [,eok])  Check that theField.value is a valid International Phone.
// checkEmail (theField [,eok])		 Check that theField.value is a valid Email.
// checkYear (theField [,eok])		Check that theField.value is a valid Year.
// checkMonth (theField [,eok])		 Check that theField.value is a valid Month.
// checkDay (theField [,eok])		Check that theField.value is a valid Day.
// checkDate (yearField, monthField, dayField, labelString, OKtoOmitDay)
//									Check that field values form a valid date.
// getRadioButtonValue (radio)		Get checked value from radio button.
//
// Performance hint: when you deploy this file on your website, strip out the
// comment lines from the source code as well as any of the functions which
// you don't need.  This will give you a smaller .js file and achieve faster
// downloads.

// VARIABLE DECLARATIONS

var digits = "0123456789";

var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"

var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
// whitespace characters
var whitespace = " \t\n\r";

// decimal point character differs by language and culture
var decimalPointDelimiter = "."
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in US phone numbers
// ajay + is added
var validUSPhoneChars = digits + phoneNumberDelimiters + "+";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = digits + phoneNumberDelimiters + "+";
// U.S. phone numbers have 10 digits.
// They are formatted as 123 456 7890 or (123) 456-7890.
var digitsInUSPhoneNumber = 10;
// non-digit characters which are allowed in ZIP Codes
var ZIPCodeDelimiters = "-";

// our preferred delimiter for reformatting ZIP Codes
var ZIPCodeDelimeter = "-"
// characters which are allowed in Zip codes
var validZIPCodeChars = digits + ZIPCodeDelimiters

// U.S. ZIP codes have 5 or 9 digits.
// They are formatted as 12345 or 12345-6789.
var digitsInZIPCode1 = 5
var digitsInZIPCode2 = 9
// non-digit characters which are allowed in credit card numbers
var creditCardDelimiters = " "
// CONSTANT STRING DECLARATIONS
// (grouped for ease of translation and localization)

// m is an abbreviation for "missing"

var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."

// s is an abbreviation for "string"
var sUSName = "Name"				// ajay
var sBestTime = "Best Time To Call"		 // ajay
var sTaxNumber = "Tax exemption number"	// ajay
var sStateName ="State Name"		// ajay 
var sUSLastName = "Last Name"
var sUSFirstName = "First Name"
var sWorldLastName = "Family Name"
var sWorldFirstName = "Given Name"
var sTitle = "Title"
var sCompanyName = "Company Name"
var sUSAddress = "Street Address"
var sWorldAddress = "Address"
var sCity = "City"
var sStateCode = "State Code"
var sWorldState = "State, Province, or Prefecture"
var sCountry = "Country"
var sZIPCode = "ZIP Code"
var sWorldPostalCode = "Postal Code"
var sPhone = "Phone Number"
var sFax = "Fax Number"
var sDateOfBirth = "Date of Birth"
var sExpirationDate = "Expiration Date"
var sEmail = "Email"
var sSSN = "Social Security Number"
var sCreditCardNumber = "Credit Card Number"
var sOtherInfo = "Other Information"


// i is an abbreviation for "invalid"

var iStateCode = "This field must be a valid two character U.S. state abbreviation (like CA for California). Please reenter it now."
var iZIPCode = "This field must be a 5 or 9 digit U.S. ZIP Code (like 94043). Please reenter it now."

// ajay var iUSPhone = "This field must be a 10 digit U.S. phone number (like 415 555 1212). Please reenter it now."
var iUSPhone = "This field must be a 10 digit or 11 digit U.S. phone number (like 415 555 1212 or +1 415 555 1212). Please reenter it now."
var iWorldPhone = "This field must be a valid international phone number. Please reenter it now."
var iSSN = "This field must be a 9 digit U.S. social security number (like 123 45 6789). Please reenter it now."
var iEmail = "This field must be a valid email address (like foo@bar.com). Please reenter it now."
var iCreditCardPrefix = "This is not a valid "
var iCreditCardSuffix = " credit card number. (Click the link on this form to see a list of sample numbers.) Please reenter it now."
var iDay = "This field must be a day number between 1 and 31.  Please reenter it now."
var iMonth = "This field must be a month number between 1 and 12.  Please reenter it now."
var iYear = "This field must be a 2 or 4 digit year number.  Please reenter it now."
var iDatePrefix = "The Day, Month, and Year for "
var iDateSuffix = " do not form a valid date.  Please reenter them now."

// p is an abbreviation for "prompt"

var pEntryPrompt = "Please enter a "
var pStateCode = "2 character code (like CA)."
var pZIPCode = "5 or 9 digit U.S. ZIP Code (like 94043)."
//ajay var pUSPhone = "10 digit U.S. phone number (like 415 555 1212)."
var pUSPhone = "10 digit or 11 digit U.S. phone number (like 415 555 1212 or +1 415 555 1212)."
var pWorldPhone = "international phone number."
var pSSN = "9 digit U.S. social security number (like 123 45 6789)."
var pEmail = "valid email address (like foo@bar.com)."
var pCreditCard = "valid credit card number."
var pDay = "day number between 1 and 31."
var pMonth = "month number between 1 and 12."
var pYear = "2 or 4 digit year number."

// Global variable defaultEmptyOK defines default return value 
// for many functions when they are passed the empty string. 
// By default, they will return defaultEmptyOK.
//
// defaultEmptyOK is false, which means that by default, 
// these functions will do "strict" validation.  Function
// isInteger, for example, will only return true if it is
// passed a string containing an integer; if it is passed
// the empty string, it will return false.
//
// You can change this default behavior globally (for all 
// functions which use defaultEmptyOK) by changing the value
// of defaultEmptyOK.
//
// Most of these functions have an optional argument emptyOK
// which allows you to override the default behavior for 
// the duration of a function call.
//
// This functionality is useful because it is possible to
// say "if the user puts anything in this field, it must
// be an integer (or a phone number, or a string, etc.), 
// but it's OK to leave the field empty too."
// This is the case for fields which are optional but which
// must have a certain kind of content if filled in.

var defaultEmptyOK = false


// Attempting to make this library run on Navigator 2.0,
// so I'm supplying this array creation routine as per
// JavaScript 1.0 documentation.  If you're using 
// Navigator 3.0 or later, you don't need to do this;
// you can use the Array constructor instead.

function makeArray(n) {
//*** BUG: If I put this line in, I get two error messages:
//(1) Window.length can't be set by assignment
//(2) daysInMonth has no property indexed by 4
//If I leave it out, the code works fine.
//  this.length = n;
  for (var i = 1; i <= n; i++) {
		this[i] = 0
  } 
  return this
}

var daysInMonth = makeArray(12);
daysInMonth[1] = 31;
daysInMonth[2] = 29;  // must programmatically check this
daysInMonth[3] = 31;
daysInMonth[4] = 30;
daysInMonth[5] = 31;
daysInMonth[6] = 30;
daysInMonth[7] = 31;
daysInMonth[8] = 31;
daysInMonth[9] = 30;
daysInMonth[10] = 31;
daysInMonth[11] = 30;
daysInMonth[12] = 31;


// Valid U.S. Postal Codes for states, territories, armed forces, etc.
// See http://www.usps.gov/ncsc/lookups/abbr_state.txt.

var USStateCodeDelimiter = "|";
var USStateCodes = "AL|AK|AS|AZ|AR|CA|CO|CT|DE|DC|FM|FL|GA|GU|HI|ID|IL|IN|IA|KS|KY|LA|ME|MH|MD|MA|MI|MN|MS|MO|MT|NE|NV|NH|NJ|NM|NY|NC|ND|MP|OH|OK|OR|PW|PA|PR|RI|SC|SD|TN|TX|UT|VT|VI|VA|WA|WV|WI|WY|AE|AA|AE|AE|AP"


// Check whether string s is empty.

function isEmpty(s)
{
	return ((s == null) || (s.length == 0))
}

// Returns true if string s is empty or 
// whitespace characters only.

function isWhitespace (s)

{
	var i;

  // Is s empty?
  if (isEmpty(s)) return true;
  
  // Search through string's characters one by one
  // until we find a non-whitespace character.
  // When we do, return false; if we don't, return true.
  
  for (i = 0; i < s.length; i++)
  {
 
		// Check that current character isn't whitespace.
		var c = s.charAt(i);
  
		if (whitespace.indexOf(c) == -1) return false;
  }
  
  // All characters are whitespace.
  return true;
}

// Removes all characters which appear in string bag from string s.

function stripCharsInBag (s, bag)
{
	var i;
  var returnString = "";

  // Search through string's characters one by one.
  // If character is not in bag, append to returnString.

  for (i = 0; i < s.length; i++)
  {
 
		// Check that current character isn't whitespace.
		var c = s.charAt(i);
		if (bag.indexOf(c) == -1) returnString += c;
  }

  return returnString;
}

// Removes all characters which do NOT appear in string bag 
// from string s.

function stripCharsNotInBag (s, bag)

{

	var i;
  var returnString = "";

	// Search through string's characters one by one.
	// If character is in bag, append to returnString.

  for (i = 0; i < s.length; i++)
  {
 
  	// Check that current character isn't whitespace.
		var c = s.charAt(i);
		if (bag.indexOf(c) != -1) returnString += c;
  }
  return returnString;
}

// Removes all whitespace characters from s.
// Global variable whitespace (see above)
// defines which characters are considered whitespace.

function stripWhitespace (s)
{
	return stripCharsInBag (s, whitespace)
}


// WORKAROUND FUNCTION FOR NAVIGATOR 2.0.2 COMPATIBILITY.
//
// The below function *should* be unnecessary.  In general,
// avoid using it.  Use the standard method indexOf instead.
//
// However, because of an apparent bug in indexOf on 
// Navigator 2.0.2, the below loop does not work as the
// body of stripInitialWhitespace:
//
// while ((i < s.length) && (whitespace.indexOf(s.charAt(i)) != -1))
//  i++;
//
// ... so we provide this workaround function charInString
// instead.
//
// charInString (CHARACTER c, STRING s)
//
// Returns true if single character c (actually a string)
// is contained within string s.

function charInString (c, s)
{
	for (i = 0; i < s.length; i++)
  {
  	if (s.charAt(i) == c) return true;
  }
  return false
}

// Removes initial (leading) whitespace characters from s.
// Global variable whitespace (see above)
// defines which characters are considered whitespace.

function stripInitialWhitespace (s)
{

	var i = 0;

  while ((i < s.length) && charInString (s.charAt(i), whitespace))
  	i++;
	
  return s.substring (i, s.length);
}



// Returns true if character c is an English letter 
// (A .. Z, a..z).
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

function isLetter (c)
{
	return ( ((c >= "a") && (c <= "z")) || ((c >= "A") && (c <= "Z")) )
}

// Returns true if character c is a digit 
// (0 .. 9).

function isDigit (c)
{
	return ((c >= "0") && (c <= "9"))
}

// Returns true if character c is a letter or digit.

function isLetterOrDigit (c)
{

	return (isLetter(c) || isDigit(c))
}

// isInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if all characters in string s are numbers.
//
// Accepts non-signed integers only. Does not accept floating 
// point, exponential notation, etc.
//
// We don't use parseInt because that would accept a string
// with trailing non-numeric characters.
//
// By default, returns defaultEmptyOK if s is empty.
// There is an optional second argument called emptyOK.
// emptyOK is used to override for a single function call
//		the default behavior which is specified globally by
//		defaultEmptyOK.
// If emptyOK is false (or any value other than true), 
//		the function will return false if s is empty.
// If emptyOK is true, the function will return true if s is empty.
//
// EXAMPLE FUNCTION CALL:	RESULT:
// isInteger ("5")			 true 
// isInteger ("")			 defaultEmptyOK
// isInteger ("-5")			false
// isInteger ("", true)		true
// isInteger ("", false)		false
// isInteger ("5", false)	true

function isInteger (s)
{
	var i;

  if (isEmpty(s)) 
  if (isInteger.arguments.length == 1) return defaultEmptyOK;
  else return (isInteger.arguments[1] == true);

	// Search through string's characters one by one
	// until we find a non-numeric character.
	// When we do, return false; if we don't, return true.

  for (i = 0; i < s.length; i++)
  {
 
		// Check that current character is number.
		var c = s.charAt(i);

		 if (!isDigit(c)) return false;
  }

	// All characters are numbers.
	return true;
}



// isSignedInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if all characters are numbers; 
// first character is allowed to be + or - as well.
//
// Does not accept floating point, exponential notation, etc.
//
// We don't use parseInt because that would accept a string
// with trailing non-numeric characters.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// EXAMPLE FUNCTION CALL:		RESULT:
// isSignedInteger ("5")			 true 
// isSignedInteger ("")			defaultEmptyOK
// isSignedInteger ("-5")		true
// isSignedInteger ("+5")		true
// isSignedInteger ("", false)		false
// isSignedInteger ("", true)	true

function isSignedInteger (s)
{
	if (isEmpty(s)) 
		if (isSignedInteger.arguments.length == 1) return defaultEmptyOK;
		else return (isSignedInteger.arguments[1] == true);
	else {
		var startPos = 0;
		var secondArg = defaultEmptyOK;

		if (isSignedInteger.arguments.length > 1)
			 secondArg = isSignedInteger.arguments[1];

		// skip leading + or -
		if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
			 startPos = 1;  
		return (isInteger(s.substring(startPos, s.length), secondArg))
	}
}


// isPositiveInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is an integer > 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isPositiveInteger (s)
{
	var secondArg = defaultEmptyOK;

	if (isPositiveInteger.arguments.length > 1)
		secondArg = isPositiveInteger.arguments[1];

	// The next line is a bit byzantine.  What it means is:
	// a) s must be a signed integer, AND
	// b) one of the following must be true:
	//  i)  s is empty and we are supposed to return true for
	//		 empty strings
	//  ii) this is a positive, not negative, number

	return (isSignedInteger(s, secondArg)	&& ( (isEmpty(s) && secondArg)  || (parseInt (s) >= 0) ));
}


// isNonnegativeInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is an integer >= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNonnegativeInteger (s)
{
	var secondArg = defaultEmptyOK;

	if (isNonnegativeInteger.arguments.length > 1)
		secondArg = isNonnegativeInteger.arguments[1];

	// The next line is a bit byzantine.  What it means is:
	// a) s must be a signed integer, AND
	// b) one of the following must be true:
	//  i)  s is empty and we are supposed to return true for
	//		 empty strings
	//  ii) this is a number >= 0

	return (isSignedInteger(s, secondArg)	&& ( (isEmpty(s) && secondArg)  || (parseInt (s) >= 0) ) );
}


// isNegativeInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is an integer < 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNegativeInteger (s)
{
	var secondArg = defaultEmptyOK;

	if (isNegativeInteger.arguments.length > 1)
		secondArg = isNegativeInteger.arguments[1];

	// The next line is a bit byzantine.  What it means is:
	// a) s must be a signed integer, AND
	// b) one of the following must be true:
	//  i)  s is empty and we are supposed to return true for
	//		 empty strings
	//  ii) this is a negative, not positive, number

	return (isSignedInteger(s, secondArg)	&& ( (isEmpty(s) && secondArg)  || (parseInt (s) < 0) ) );
}


// isNonpositiveInteger (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is an integer <= 0.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isNonpositiveInteger (s)
{
	var secondArg = defaultEmptyOK;

	if (isNonpositiveInteger.arguments.length > 1)
		secondArg = isNonpositiveInteger.arguments[1];

	// The next line is a bit byzantine.  What it means is:
	// a) s must be a signed integer, AND
	// b) one of the following must be true:
	//  i)  s is empty and we are supposed to return true for
	//		 empty strings
	//  ii) this is a number <= 0

	return (isSignedInteger(s, secondArg) && ( (isEmpty(s) && secondArg)  || (parseInt (s) <= 0) ) );
}

// isFloat (STRING s [, BOOLEAN emptyOK])
// 
// True if string s is an unsigned floating point (real) number. 
//
// Also returns true for unsigned integers. If you wish
// to distinguish between integers and floating point numbers,
// first call isInteger, then call isFloat.
//
// Does not accept exponential notation.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isFloat (s)

{
	var i;
	var seenDecimalPoint = false;

	if (isEmpty(s)) 
		 if (isFloat.arguments.length == 1) return defaultEmptyOK;
		 else return (isFloat.arguments[1] == true);

	if (s == decimalPointDelimiter) return false;

	// Search through string's characters one by one
	// until we find a non-numeric character.
	// When we do, return false; if we don't, return true.

	for (i = 0; i < s.length; i++)
	{
 
		// Check that current character is number.
		var c = s.charAt(i);

		if ((c == decimalPointDelimiter) && !seenDecimalPoint) seenDecimalPoint = true;
		else if (!isDigit(c)) return false;
	}

	// All characters are numbers.
	return true;
}

function isCurrency (s) {
  strCurr = String(s);
	if (isWhitespace (strCurr))
		return false;
	if (isFloat (strCurr)){
		 strCurr=strCurr+"";
		 if (strCurr.indexOf('.') != -1 ) {
		/* Check to ensure only two digits trailing after decimal */
		if(strCurr.substring(strCurr.indexOf('.') + 1).length > 2) {
		
			 return false;
		}
		// check to ensure only 9 digits are allowed before decimal
		if(strCurr.substring(0,strCurr.indexOf('.')).length > 9)
			 return false;		
		else
			 return true;
		 }
		 else {
		if (strCurr.length > 9)
			 return false;
		else return true;
		}
	}
}


// isSignedFloat (STRING s [, BOOLEAN emptyOK])
// 
// True if string s is a signed or unsigned floating point 
// (real) number. First character is allowed to be + or -.
//
// Also returns true for unsigned integers. If you wish
// to distinguish between integers and floating point numbers,
// first call isSignedInteger, then call isSignedFloat.
//
// Does not accept exponential notation.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isSignedFloat (s)
{
	if (isEmpty(s)) 
		 if (isSignedFloat.arguments.length == 1) return defaultEmptyOK;
		 else return (isSignedFloat.arguments[1] == true);

	else {
		var startPos = 0;
		var secondArg = defaultEmptyOK;

		if (isSignedFloat.arguments.length > 1)
			 secondArg = isSignedFloat.arguments[1];

		// skip leading + or -
		if ( (s.charAt(0) == "-") || (s.charAt(0) == "+") )
			 startPos = 1;  
		return (isFloat(s.substring(startPos, s.length), secondArg))
	}
}


// isAlphabetic (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is English letters 
// (A .. Z, a..z) only.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

function isAlphabetic (s)
{
	var i;
  s = s + "";
	if (isEmpty(s)) 
		 if (isAlphabetic.arguments.length == 1) return defaultEmptyOK;
		 else return (isAlphabetic.arguments[1] == true);

	// Search through string's characters one by one
	// until we find a non-alphabetic character.
	// When we do, return false; if we don't, return true.

	for (i = 0; i < s.length; i++)
	{
		// Check that current character is letter.
		var c = s.charAt(i);

		if (!isLetter(c))
		return false;
	}

	// All characters are letters.
	return true;
}

// isAlphanumeric (STRING s [, BOOLEAN emptyOK])
// 
// Returns true if string s is English letters 
// (A .. Z, a..z) and numbers only.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
//
// NOTE: Need i18n version to support European characters.
// This could be tricky due to different character
// sets and orderings for various languages and platforms.

function isAlphanumeric (s)
{
	var i;

	if (isEmpty(s)) 
		 if (isAlphanumeric.arguments.length == 1) return defaultEmptyOK;
		 else return (isAlphanumeric.arguments[1] == true);

	// Search through string's characters one by one
	// until we find a non-alphanumeric character.
	// When we do, return false; if we don't, return true.

	for (i = 0; i < s.length; i++)
	{
		// Check that current character is number or letter.
		var c = s.charAt(i);

		if (! (isLetter(c) || isDigit(c) ) )
		return false;
	}

	// All characters are numbers or letters.
	return true;
}


// reformat (TARGETSTRING, STRING, INTEGER, STRING, INTEGER ... )		
//
// Handy function for arbitrarily inserting formatting characters
// or delimiters of various kinds within TARGETSTRING.
//
// reformat takes one named argument, a string s, and any number
// of other arguments.  The other arguments must be integers or
// strings.  These other arguments specify how string s is to be
// reformatted and how and where other strings are to be inserted
// into it.
//
// reformat processes the other arguments in order one by one.
// * If the argument is an integer, reformat appends that number 
//  of sequential characters from s to the resultString.
// * If the argument is a string, reformat appends the string
//  to the resultString.
//
// NOTE: The first argument after TARGETSTRING must be a string.
// (It can be empty.)  The second argument must be an integer.
// Thereafter, integers and strings must alternate.  This is to
// provide backward compatibility to Navigator 2.0.2 JavaScript
// by avoiding use of the typeof operator.
//
// It is the caller's responsibility to make sure that we do not
// try to copy more characters from s than s.length.
//
// EXAMPLES:
//
// * To reformat a 10-digit U.S. phone number from "1234567890"
//  to "(123) 456-7890" make this function call:
//  reformat("1234567890", "(", 3, ") ", 3, "-", 4)
//
// * To reformat a 9-digit U.S. Social Security number from
//  "123456789" to "123-45-6789" make this function call:
//  reformat("123456789", "", 3, "-", 2, "-", 4)
//
// HINT:
//
// If you have a string which is already delimited in one way
// (example: a phone number delimited with spaces as "123 456 7890")
// and you want to delimit it in another way using function reformat,
// call function stripCharsNotInBag to remove the unwanted 
// characters, THEN call function reformat to delimit as desired.
//
// EXAMPLE:
//
// reformat (stripCharsNotInBag ("123 456 7890", digits),
//			 "(", 3, ") ", 3, "-", 4)

function reformat (s)
{
	var arg;
	var sPos = 0;
	var resultString = "";

	for (var i = 1; i < reformat.arguments.length; i++) {
		 arg = reformat.arguments[i];
		 if (i % 2 == 1) resultString += arg;
		 else {
			 resultString += s.substring(sPos, sPos + arg);
			 sPos += arg;
		 }
	}
	return resultString;
}

// isUSPhoneNumber (STRING s [, BOOLEAN emptyOK])
// 
// isUSPhoneNumber returns true if string s is a valid U.S. Phone
// Number may be 10 digits, 11 digit or 11 digit with leading +.
//
// NOTE: Strip out any delimiters (spaces, hyphens, parentheses, etc.)
// from string s before calling this function.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isUSPhoneNumber (s)
{
  if (isEmpty(s)) 
		 if (isUSPhoneNumber.arguments.length == 1) return defaultEmptyOK;
		 else return (isUSPhoneNumber.arguments[1] == true);

/*		
  commented by ajay 
  return (isInteger(s) && s.length == digitsInUSPhoneNumber)
*/

/*  now we may have a leading + if length is 12. 
  So check for first charcater for +.if it is not + then return 0. 
  If it is + then cut this leading + from the number and after check 
  the rest for 
  1. All character must be digit.
  2. If length is 11 then first digit should be 1 
  if above two are satisfied then valid usphone number. 

*/
  var s1 = s;
  
  if (s.length == 12 && s.charAt(0) != '+'){
		return(0);
  }

  if (s.length == 12 && s.charAt(0) == '+'){
		s1 = s.substr(1);
  }

  return (isInteger(s1) && (s1.length == digitsInUSPhoneNumber || ( s1.length == 11 && s1.charAt(0)=='1')))
}


// isInternationalPhoneNumber (STRING s [, BOOLEAN emptyOK])
// 
// isInternationalPhoneNumber returns true if string s is a valid 
// international phone number.  Must be digits only; any length OK.
// May be prefixed by + character.
//
// NOTE: A phone number of all zeros would not be accepted.
// I don't think that is a valid phone number anyway.
//
// NOTE: Strip out any delimiters (spaces, hyphens, parentheses, etc.)
// from string s before calling this function.  You may leave in 
// leading + character if you wish.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isInternationalPhoneNumber (s)
{
	if (isEmpty(s)) 
		 if (isInternationalPhoneNumber.arguments.length == 1) return defaultEmptyOK;
		 else return (isInternationalPhoneNumber.arguments[1] == true);
	return (isPositiveInteger(s))
}


// isZIPCode (STRING s [, BOOLEAN emptyOK])
// 
// isZIPCode returns true if string s is a valid 
// U.S. ZIP code.  Must be 5 or 9 digits only.
//
// NOTE: Strip out any delimiters (spaces, hyphens, etc.)
// from string s before calling this function.  
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isZIPCode (s)
{
	if (isEmpty(s)) 
		 if (isZIPCode.arguments.length == 1) return defaultEmptyOK;
		 else return (isZIPCode.arguments[1] == true);
  return (isInteger(s) && ((s.length == digitsInZIPCode1) || (s.length == digitsInZIPCode2)))
}

// isStateCode (STRING s [, BOOLEAN emptyOK])
// 
// Return true if s is a valid U.S. Postal Code 
// (abbreviation for state).
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isStateCode(s)
{
	if (isEmpty(s)) 
		 if (isStateCode.arguments.length == 1) return defaultEmptyOK;
		 else return (isStateCode.arguments[1] == true);
	return ( (USStateCodes.indexOf(s) != -1) && (s.indexOf(USStateCodeDelimiter) == -1) )
}


// isEmail (STRING s [, BOOLEAN emptyOK])
// 
// Email address must be of form a@b.c -- in other words:
// * there must be at least one character before the @
// * there must be at least one character before and after the .
// * the characters @ and . are both required
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isEmail (s)
{
	if (isEmpty(s)) 
		 if (isEmail.arguments.length == 1) return defaultEmptyOK;
		 else return (isEmail.arguments[1] == true);
  
	// is s whitespace?
	if (isWhitespace(s)) return false;
	
	// there must be >= 1 character before @, so we
	// start looking at character position 1 
	// (i.e. second character)
	var i = 1;
	var sLength = s.length;

	// look for @
	while ((i < sLength) && (s.charAt(i) != "@"))
	{
		i++
	}

	if ((i >= sLength) || (s.charAt(i) != "@")) return false;
	else i += 2;

	// look for .
	while ((i < sLength) && (s.charAt(i) != "."))
	{
		i++
	}

	// there must be at least one character after the .
	if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;  
  
  var emailtext = s;
  if  (( emailtext.indexOf("\/",0) !=-1) || 
		( emailtext.indexOf("\\",0) !=-1) || 
		( emailtext.indexOf("#",0) !=-1)  || 
		( emailtext.indexOf("&",0) !=-1)  ||
		( emailtext.indexOf("*",0) !=-1)  || 
		( emailtext.indexOf("\'",0) !=-1) || 
		( emailtext.indexOf("\"",0) !=-1) || 
		( emailtext.indexOf("?",0) !=-1)  || 
		(emailtext.indexOf("$",0) !=-1)	||
		(emailtext.indexOf(" ",0) !=-1)) return false;		
  // now check for repeated entry of @
		 var positionat  = emailtext.indexOf("@",1);		
		 var emailsubstr = s;
		 emailsubstr = emailsubstr.substr(positionat+1);
		 if (emailsubstr.indexOf("@",0) !=-1) return false; 
			else return true;
  }

// isYear (STRING s [, BOOLEAN emptyOK])
// 
// isYear returns true if string s is a valid 
// Year number.  Must be 2 or 4 digits only.
// 
// For Year 2000 compliance, you are advised
// to use 4-digit year numbers everywhere.
//
// And yes, this function is not Year 10000 compliant, but 
// because I am giving you 8003 years of advance notice,
// I don't feel very guilty about this ...
//
// For B.C. compliance, write your own function. ;->
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isYear (s)
{
	if (isEmpty(s)) 
		 if (isYear.arguments.length == 1) return defaultEmptyOK;
		 else return (isYear.arguments[1] == true);
	if (!isNonnegativeInteger(s)) return false;
	return ((s.length == 2) || (s.length == 4));
}

// isIntegerInRange (STRING s, INTEGER a, INTEGER b [, BOOLEAN emptyOK])
// 
// isIntegerInRange returns true if string s is an integer 
// within the range of integer arguments a and b, inclusive.
// 
// For explanation of optional argument emptyOK,
// see comments of function isInteger.
function isIntegerInRange (s, a, b)
{
	if (isEmpty(s)) 
		 if (isIntegerInRange.arguments.length == 1) return defaultEmptyOK;
		 else return (isIntegerInRange.arguments[1] == true);

	// Catch non-integer strings to avoid creating a NaN below,
	// which isn't available on JavaScript 1.0 for Windows.
	if (!isInteger(s, false)) return false;

	// Now, explicitly change the type to integer via parseInt
	// so that the comparison code below will work both on 
	// JavaScript 1.2 (which typechecks in equality comparisons)
	// and JavaScript 1.1 and before (which doesn't).
	var num = parseInt (s);
	return ((num >= a) && (num <= b));
}

// isMonth (STRING s [, BOOLEAN emptyOK])
// 
// isMonth returns true if string s is a valid 
// month number between 1 and 12.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isMonth (s)
{
	if (isEmpty(s)) 
		 if (isMonth.arguments.length == 1) return defaultEmptyOK;
		 else return (isMonth.arguments[1] == true);
	return isIntegerInRange (s, 1, 12);
}

// isDay (STRING s [, BOOLEAN emptyOK])
// 
// isDay returns true if string s is a valid 
// day number between 1 and 31.
// 
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function isDay (s)
{
	if (isEmpty(s)) 
		 if (isDay.arguments.length == 1) return defaultEmptyOK;
		 else return (isDay.arguments[1] == true);  
	return isIntegerInRange (s, 1, 31);
}

// daysInFebruary (INTEGER year)
// 
// Given integer argument year,
// returns number of days in February of that year.

function daysInFebruary (year)
{
// February has 29 days in any year evenly divisible by four,
	// EXCEPT for centurial years which are not also divisible by 400.
	return (  ((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0) ) ) ? 29 : 28 );
}

// isDate (STRING year, STRING month, STRING day)
//
// isDate returns true if string arguments year, month, and day 
// form a valid date.
// 

function isDate (year, month, day)
{
// catch invalid years (not 2- or 4-digit) and invalid months and days.
	if (! (isYear(year, false) && isMonth(month, false) && isDay(day, false))) return false;

	// Explicitly change type to integer to make code work in both
	// JavaScript 1.1 and JavaScript 1.2.
	var intYear = parseInt(year);
	var intMonth = parseInt(month);
	var intDay = parseInt(day);

	// catch invalid days, except for February
	if (intDay > daysInMonth[intMonth]) return false; 

	if ((intMonth == 2) && (intDay > daysInFebruary(intYear))) return false;

	return true;
}

// isValidComboDate (STRING year, STRING month, STRING day)
//
// isValidComboDate returns true if string arguments year, month, and day 
// form a valid date. The basic checks for month < 12/ year 4 digit
// are not required since these values are being picked from combos.
// 

function isValidComboDate (year, month, day)
{

	// Explicitly change type to integer to make code work in both
	// JavaScript 1.1 and JavaScript 1.2.
	var intYear = parseInt(year);
	var intMonth = parseInt(month);
	var intDay = parseInt(day);

	// catch invalid days, except for February
	if (intDay > daysInMonth[intMonth]) return false; 

	if ((intMonth == 2) && (intDay > daysInFebruary(intYear))) return false;

	return true;
}
/* FUNCTIONS TO NOTIFY USER OF INPUT REQUIREMENTS OR MISTAKES. */
// Display prompt string s in status bar.

function prompt (s)
{
  window.status = s
}

// Display data entry prompt string s in status bar.

function promptEntry (s)
{
  window.status = pEntryPrompt + s
}


// Notify user that required field theField is empty.
// String s describes expected contents of theField.value.
// Put focus in theField and return false.

function warnEmpty (theField, s)
{
  theField.focus()
  alert(mPrefix + s + mSuffix)
  return false
}

// Notify user that contents of field theField are invalid.
// String s describes expected contents of theField.value.
// Put select theField, pu focus in it, and return false.

function warnInvalid (theField, s)
{
  theField.focus()
  theField.select()
  alert(s)
  return false
}


/* FUNCTIONS TO INTERACTIVELY CHECK VARIOUS FIELDS. */

// checkString (TEXTFIELD theField, STRING s, [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is not all whitespace.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkString (theField, s, emptyOK)
{
  // Next line is needed on NN3 to avoid "undefined is not a number" error
  // in equality comparison below.
  if (checkString.arguments.length == 2) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  if (isWhitespace(theField.value)) 
		return warnEmpty (theField, s);
  else return true;
}

// checkStateCode (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid U.S. state code.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkStateCode (theField, emptyOK)
{
	if (checkStateCode.arguments.length == 1) emptyOK = defaultEmptyOK;
	if ((emptyOK == true) && (isEmpty(theField.value))) return true;
	else
	{
 		theField.value = theField.value.toUpperCase();
		 if (!isStateCode(theField.value, false)) 
			return warnInvalid (theField, iStateCode);
		 else return true;
	}
}

// takes ZIPString, a string of 5 or 9 digits;
// if 9 digits, inserts separator hyphen

function reformatZIPCode (ZIPString)
{
  if (ZIPString.length == 5) return ZIPString;
  else return (reformat (ZIPString, "", 5, "-", 4));
}


// checkZIPCode (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid ZIP code.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkZIPCode (theField, emptyOK)
{
  if (checkZIPCode.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  else
  {
		var normalizedZIP = stripCharsInBag(theField.value, ZIPCodeDelimiters)
		if (!isZIPCode(normalizedZIP, false)) 
			 return warnInvalid (theField, iZIPCode);
		else 
		{
		// if you don't want to insert a hyphen, comment next line out
			 theField.value = reformatZIPCode(normalizedZIP)
			 return true;
		}
  }
}

// Takes USPhone, a string of 10 digits or 11 digits with or without leading +
// and reformats as (123) 456-7890 or 1 (123) 456-7890

function reformatUSPhone (USPhone)
{
/*  Commented by ajay because phone number may be of 11 digit with 
  or without leading + or 10 digit.
  return (reformat (USPhone, "(", 3, ") ", 3, "-", 4))
*/

/*  If phone no is of ten digit then fromat it as being done earlier 
  otherwise strip out + character if exists and then format it.
*/
  if (USPhone.length == digitsInUSPhoneNumber)
		return (reformat (USPhone, "(", 3, ") ", 3, "-", 4))
  else{
			USPhone = stripCharsInBag(USPhone, "+")
			return (reformat (USPhone, "",1," (", 3, ") ", 3, "-", 4))
  }
}

// checkUSPhone (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid US Phone.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkUSPhone (theField, emptyOK)
{
  if (checkUSPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  else
  {
		var normalizedPhone = stripCharsInBag(theField.value, phoneNumberDelimiters)
		if (!isUSPhoneNumber(normalizedPhone, false)) 
			return warnInvalid (theField, iUSPhone);
		else 
		{
 // if you don't want to reformat as (123) 456-789, comment next line out
			theField.value = reformatUSPhone(normalizedPhone)	
			return true;
		}
  }
}

// checkInternationalPhone (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid International Phone.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkInternationalPhone (theField, emptyOK)
{
  if (checkInternationalPhone.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  else
  {
		if (!isInternationalPhoneNumber(theField.value, false)) 
			return warnInvalid (theField, iWorldPhone);
		else return true;
  }
}

// checkEmail (TEXTFIELD theField [, BOOLEAN emptyOK==false])
//
// Check that string theField.value is a valid Email.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkEmail (theField, emptyOK)
{
  if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  else if (!isEmail(theField.value, false)) 
		return warnInvalid (theField, iEmail);
  else return true;
}
// Check that string theField.value is a valid Year.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkYear (theField, emptyOK)
{
  if (checkYear.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  if (!isYear(theField.value, false)) 
		return warnInvalid (theField, iYear);
  else return true;
}
// Check that string theField.value is a valid Month.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkMonth (theField, emptyOK)
{
  if (checkMonth.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  if (!isMonth(theField.value, false)) 
    return warnInvalid (theField, iMonth);
  else return true;
}
// Check that string theField.value is a valid Day.
//
// For explanation of optional argument emptyOK,
// see comments of function isInteger.

function checkDay (theField, emptyOK)
{
  if (checkDay.arguments.length == 1) emptyOK = defaultEmptyOK;
  if ((emptyOK == true) && (isEmpty(theField.value))) return true;
  if (!isDay(theField.value, false)) 
		return warnInvalid (theField, iDay);
  else return true;
}

// checkDate (yearField, monthField, dayField, STRING labelString [, OKtoOmitDay==false])
//
// Check that yearField.value, monthField.value, and dayField.value 
// form a valid date.
//
// If they don't, labelString (the name of the date, like "Birth Date")
// is displayed to tell the user which date field is invalid.
//
// If it is OK for the day field to be empty, set optional argument
// OKtoOmitDay to true.  It defaults to false.

function checkDate (yearField, monthField, dayField, labelString, OKtoOmitDay)
{
  // Next line is needed on NN3 to avoid "undefined is not a number" error
  // in equality comparison below.
  if (checkDate.arguments.length == 4) OKtoOmitDay = false;
  if (!isYear(yearField.value)) return warnInvalid (yearField, iYear);
  if (!isMonth(monthField.value)) return warnInvalid (monthField, iMonth);
  if ( (OKtoOmitDay == true) && isEmpty(dayField.value) ) return true;
  else if (!isDay(dayField.value)) 
		return warnInvalid (dayField, iDay);
  if (isDate (yearField.value, monthField.value, dayField.value))
		return true;
  alert (iDatePrefix + labelString + iDateSuffix)
  return false
}

// Get checked value from radio button.

function getRadioButtonValue (radio)
{
  for (var i = 0; i < radio.length; i++)
  {
		if (radio[i].checked) {
			break
		}
  }
  return radio[i].value
}

// Checks for characters other than numbers 0-9 & '.' , in 'string'
function checkNumeric(string) {

  var numStr = "0123456789.";
  var cmpStr = new String(string);
  var len = cmpStr.length;
  for(var i=0; i<len; i++) 
  {
		if(numStr.indexOf(cmpStr.charAt(i)) == -1)
			return true;
  }
  return false;
}

// This function converts hours to minutes.
function toMinutes(hrString) 
{
  var hrs = hrString * 1; // convert the hour string to number
  var minVal = hrs * 60; // convert to minutes
  return minVal;
} 

// Removes all two whitespace characters from s.
// Global variable whitespace (see above)
// defines which characters are considered whitespace.

function stripDoubleWhiteSpace(strSpace)
{
  strSpace = strSpace + "";
  strSpace = stripInitialWhitespace (strSpace);
  strSpace = strSpace.replace(/  /g,' '); 
  return strSpace;
}

function isName(fieldVal) 
{
// Checks for character other than ".", 				// "'" or alphabets
	var len = fieldVal.length;
	var char1 = "";
	var string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.' ";
	for(i=0; i<len; i++) {
		char1 = fieldVal.charAt(i);
		if(string.indexOf(char1) == -1) 
			 return false;
	}
	return true;  
} 

function stripTrailingWhitespace (s)
{
	s = s + "";
	var i = s.length;
  while ((i > 0) && charInString (s.charAt(i-1), whitespace))
  	i--;
  return s.substring (0, i);
}

function stripInitialBlankSpaces(formObj) 
{
  for (var i=0; i < formObj.elements.length;i++){
		objElement = formObj.elements[i];
		if (objElement.type == "text" || objElement.type == 'textarea') {
			objElement.value = stripInitialWhitespace(objElement.value);
		}
  
  }
}

function trimBlankSpaces(formObj) 
{
  for (var i=0; i < formObj.elements.length;i++){
		objElement = formObj.elements[i];
		if (objElement.type == "text" || objElement.type == 'textarea') {
			objElement.value = stripInitialWhitespace(objElement.value);
			objElement.value = stripTrailingWhitespace(objElement.value);
		}
  
  }
}

function pureinteger(field)
{
	var valid = "0123456789";
	for (var i=0; i < field.length; i++) 
	{
		temp = "" + field.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") 
		{
			return false;		
		}		
	}
		return true;
}

function isParasDate(dateVal)
{
	var count=0;
	var len = 0;
	var index = 0;
	var dd = "";
	var mm = "";
	var yr = "";
	var trigger=true;
	var flag;
	
	for (len=0;len<dateVal.length;len++)
	{
		ch=dateVal.charAt(len);
		if(ch=='/')
			count++;
	}
	if(count<2 || count>2)
	{
	return false;
	}
	else
	{
		while(flag=dateVal.charAt(index)!='/')
		{
			ch=dateVal.charAt(index);
			if(trigger)
			{
				if(ch!='0')
			  {
			  	dd = dd + ch;
			  }
			}  
			else
			{
			   dd = dd + ch;
			}
			trigger=false;    		
			index++;
		}		
		index++;
		trigger=true;
		while(flag=dateVal.charAt(index)!='/')
		{
			ch=dateVal.charAt(index);
			if(trigger)
			{
			  if(ch!='0')
			  {
			  	mm = mm + ch;
			  }
			}  
			else
			{
			    mm = mm + ch;
			}
			trigger=false;    
			index++;
		}
		index++;
		while(index!=dateVal.length)
		{
			ch=dateVal.charAt(index);
			yr=yr+ch;
			index++;
		}
		if(yr.length<4)
		{
			return false;
		}	 		
		else if(!isDate(yr,mm,dd))
		{
			return false;
		}	
		
		return true;
	}	
}			

function dateDiff(date1,date2) 
{
	var index = 0;
	var dd = "";
	var mm = "";
	var yr = "";
	var dd1 = "";
	var mm1 = "";
	var yr1 = "";
	
	while(flag=date1.charAt(index)!='/')
		{
			ch=date1.charAt(index);
			dd = dd + ch;
			index++;
		}
		index++;
		if(dd.length==1)
			dd = 0 + dd;
		
		while(flag=date1.charAt(index)!='/')
		{
			ch=date1.charAt(index);
			mm = mm + ch;
			index++;
		}
		index++;
		if(mm.length==1)
			mm = 0 + mm;
		
		while(index!=date1.length)
		{
			ch=date1.charAt(index);
			yr = yr + ch;
			index++;
		}	
	
	index=0;	
	while(flag=date2.charAt(index)!='/')
		{
			ch=date2.charAt(index);
			dd1 = dd1 + ch;
			index++;
		}		
		index++;
		if(dd1.length==1)
			dd1 = 0 + dd1;
			
		while(flag=date2.charAt(index)!='/')
		{
			ch=date2.charAt(index);
			mm1 = mm1 +ch;
			index++;
		}
		index++;
		if(mm1.length==1)
			mm1 = 0 + mm1;
			
		while(index!=date2.length)
		{
			ch=date2.charAt(index);
			yr1 = yr1 + ch;
			index++;
		}		
	//alert(dd + ',' + mm + ',' + yr);	
	//alert(dd1 + ',' + mm1 + ',' + yr1);
 	if (yr<yr1)
	{
		return false;	
	}
	else if(yr==yr1)
	{	
		if(mm<mm1)
		{
			return false;
		}
		else if(mm==mm1)
		{
			if(dd<dd1 || dd==dd1)
			{
				return false;
			}
		}
	}
	return true;
}