function  validateString( strValue ) {
 var objRegExp  =  /(^[a-zA-Z]+$)/; 
  return objRegExp.test(strValue);
}
function  validateNumeric( strValue ) {
/******************************************************************************
DESCRIPTION: Validates that a string contains only valid numbers.

PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
******************************************************************************/
  var objRegExp  =  /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/; 
 
  //check for numeric characters 
  return objRegExp.test(strValue);
}

function validateInteger( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains only 
    valid integer number.
    
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
******************************************************************************/
  var objRegExp  = /(^-?\d\d*$)/;
 
  //check for integer characters
  return objRegExp.test(strValue);
}

function validateNotEmpty( strValue ) {
/************************************************
DESCRIPTION: Validates that a string is not all
  blank (whitespace) characters.
    
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/
   var strTemp = strValue;
   strTemp = trimAll(strTemp);
   if(strTemp.length > 0){
     return true;
   }  
   return false;
}

function validateEmail(strValue) {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid email pattern. 
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
   
REMARKS: Accounts for email with country appended
  does not validate that email contains valid URL
  type (.com, .gov, etc.) and optionally,
  a valid country suffix.  Since email has many
  forms this expression only tests for near valid
  address.  Some additional validation may be
  required.
*************************************************/
var objRegExp  = /^[a-z0-9]([a-z0-9_\-\.]*)@([a-z0-9_\-\.]*)(\.[a-z]{2,3}(\.[a-z]{2}){0,2})$/i;
  //check for valid email
  return objRegExp.test(strValue);
}

function rightTrim( strValue ) {
/************************************************
DESCRIPTION: Trims trailing whitespace chars.
    
PARAMETERS:
   strValue - String to be trimmed.  
      
RETURNS:
   Source string with right whitespaces removed.
*************************************************/
var objRegExp = /^([\w\W]*)(\b\s*)$/;
 
      if(objRegExp.test(strValue)) {
       //remove trailing a whitespace characters
       strValue = strValue.replace(objRegExp, '$1');
    }
  return strValue;
}

function leftTrim( strValue ) {
/************************************************
DESCRIPTION: Trims leading whitespace chars.
    
PARAMETERS:
   strValue - String to be trimmed
   
RETURNS:
   Source string with left whitespaces removed.
*************************************************/
var objRegExp = /^(\s*)(\b[\w\W]*)$/;
 
      if(objRegExp.test(strValue)) {
       //remove leading a whitespace characters
       strValue = strValue.replace(objRegExp, '$2');
    }
  return strValue;
}

function trimAll( strValue ) {
/************************************************
DESCRIPTION: Removes leading and trailing spaces.

PARAMETERS: Source string from which spaces will
  be removed;

RETURNS: Source string with whitespaces removed.
*************************************************/ 
 var objRegExp = /^(\s*)$/;

    //check for all spaces
    if(objRegExp.test(strValue)) {
       strValue = strValue.replace(objRegExp, '');
       if( strValue.length == 0)
          return strValue;
    }
    
   //check for leading & trailing spaces
   objRegExp = /^(\s*)([\W\w]*)(\b\s*$)/;
   if(objRegExp.test(strValue)) {
       //remove leading and trailing whitespace characters
       strValue = strValue.replace(objRegExp, '$2');
    }
  return strValue;
}

function validateCurrency( strValue)  {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid currency format. 
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/
  var objRegExp = /(^\$\d{1,3}(,\d{3})*\.\d{2}$)|(^\(\$\d{1,3}(,\d{3})*\.\d{2}\)$)/;

  return objRegExp.test( strValue );
}

function validateTime ( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid 12 hour time format. Seconds are optional.
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.

REMARKS: Returns True for time formats such as:
  HH:MM or HH:MM:SS or HH:MM:SS.mmm (where the
  .mmm is milliseconds as used in SQL Server 
  datetime datatype.  Also, the .mmm portion will 
  accept 1 to 3 digits after the period)
*************************************************/
  var objRegExp = /^([1-9]|1[0-2]):[0-5]\d(:[0-5]\d(\.\d{1,3})?)?$/;

  return objRegExp.test( strValue );

}

function validateState (strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid state abbreviation. 
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/

var objRegExp = /^(AK|AL|AR|AZ|CA|CO|CT|DC|DE|FL|GA|HI|IA|ID|IL|IN|KS|KY|LA|MA|MD|ME|MI|MN|MO|MS|MT|NB|NC|ND|NH|NJ|NM|NV|NY|OH|OK|OR|PA|RI|SC|SD|TN|TX|UT|VA|VT|WA|WI|WV|WY)$/i; 
  return objRegExp.test(strValue);
}

function validateSSN( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid social security number. 
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/
var objRegExp  = /^\d{3}\-\d{2}\-\d{4}$/;
 
  //check for valid SSN
  return objRegExp.test(strValue);

}



function validateUSPhone( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains valid
  US phone pattern. 
  Ex. (999) 999-9999 or (999)999-9999
  
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/
  var objRegExp  = /^\([1-9]\d{2}\)\s?\d{3}\-\d{4}$/;
 
  //check for valid us phone with or without space between 
  //area code
  return objRegExp.test(strValue); 
}


function validateUSZip( strValue ) {
/************************************************
DESCRIPTION: Validates that a string a United
  States zip code in 5 digit format or zip+4
  format. 99999 or 99999-9999
    
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.

*************************************************/
var objRegExp  = /(^\d{5}$)|(^\d{5}-\d{4}$)/;
 
  //check for valid US Zipcode
  return objRegExp.test(strValue);
}


function validateUrl(strValue) {
/************************************************
DESCRIPTION: Validates that a string contains a 
  valid url pattern. 
  
 PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
*************************************************/
	var objRegExp=/^(http:\/\/www.|https:\/\/www.|ftp:\/\/www.|www.|http:\/\/|https:\/\/){1}([\w]+)(.[\w]+){1,2}$/;
	//check for valid url
	return objRegExp.test(strValue);
} 


function replace(argvalue, x, y) {

  if ((x == y) || (parseInt(y.indexOf(x)) > -1)) {
    errmessage = "replace function error: \n";
    errmessage += "Second argument and third argument could be the same ";
    errmessage += "or third argument contains second argument.\n";
    errmessage += "This will create an infinite loop as it's replaced globally.";
    alert(errmessage);
    return false;
  }
    
  while (argvalue.indexOf(x) != -1) {
    var leading = argvalue.substring(0, argvalue.indexOf(x));
    var trailing = argvalue.substring(argvalue.indexOf(x) + x.length, 
	argvalue.length);
    argvalue = leading + y + trailing;
  }

  return argvalue;

}

function validateUSDate( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains only 
    valid dates with 2 digit month, 2 digit day, 
    4 digit year. Date separator can be ., -, or /.
    Uses combination of regular expressions and 
    string parsing to validate date.
    Ex. mm/dd/yyyy or mm-dd-yyyy or mm.dd.yyyy
    
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
   
REMARKS:
   Avoids some of the limitations of the Date.parse()
   method such as the date separator character.
*************************************************/
  var objRegExp = /^\d{1,2}(\-|\/|\.)\d{1,2}\1\d{4}$/
 
  //check to see if in correct format
  if(!objRegExp.test(strValue))
    return false; //doesn't match pattern, bad date
  else{
    var arrayDate = strValue.split(RegExp.$1); //split date into month, day, year
	var intDay = parseInt(arrayDate[1],10); 
	var intYear = parseInt(arrayDate[2],10);
    var intMonth = parseInt(arrayDate[0],10);
	
	//check for valid month
	if(intMonth > 12 || intMonth < 1) {
		return false;
	}
	
    //create a lookup for months not equal to Feb.
    var arrayLookup = { '01' : 31,'03' : 31, '04' : 30,'05' : 31,'06' : 30,'07' : 31,
                        '08' : 31,'09' : 30,'10' : 31,'11' : 30,'12' : 31}
  
    //check if month value and day value agree
    if(arrayLookup[arrayDate[0]] != null) {
      if(intDay <= arrayLookup[arrayDate[0]] && intDay != 0)
        return true; //found in lookup table, good date
    }
		
    //check for February
	var booLeapYear = (intYear % 4 == 0 && (intYear % 100 != 0 || intYear % 400 == 0));
    if( ((booLeapYear && intDay <= 29) || (!booLeapYear && intDay <=28)) && intDay !=0)
      return true; //Feb. had valid number of days
  }
  return false; //any other values, bad date
}

function validateValue( strValue, strMatchPattern ) {
/************************************************
DESCRIPTION: Validates that a string a matches
  a valid regular expression value.
    
PARAMETERS:
   strValue - String to be tested for validity
   strMatchPattern - String containing a valid
      regular expression match pattern.
      
RETURNS:
   True if valid, otherwise false.
*************************************************/
var objRegExp = new RegExp( strMatchPattern);
 
 //check if string matches pattern
 return objRegExp.test(strValue);
}


function removeCurrency( strValue ) {
/************************************************
DESCRIPTION: Removes currency formatting from 
  source string.
  
PARAMETERS: 
  strValue - Source string from which currency formatting
     will be removed;

RETURNS: Source string with commas removed.
*************************************************/
  var objRegExp = /\(/;
  var strMinus = '';
 
  //check if negative
  if(objRegExp.test(strValue)){
    strMinus = '-';
  }
  
  objRegExp = /\)|\(|[,]/g;
  strValue = strValue.replace(objRegExp,'');
  if(strValue.indexOf('$') >= 0){
    strValue = strValue.substring(1, strValue.length);
  }
  return strMinus + strValue;
}

function addCurrency( strValue ) {
/************************************************
DESCRIPTION: Formats a number as currency.

PARAMETERS: 
  strValue - Source string to be formatted

REMARKS: Assumes number passed is a valid 
  numeric value in the rounded to 2 decimal 
  places.  If not, returns original value.
*************************************************/
  var objRegExp = /-?[0-9]+\.[0-9]{2}$/;
   
    if( objRegExp.test(strValue)) {
      objRegExp.compile('^-');
      strValue = addCommas(strValue);
      if (objRegExp.test(strValue)){
        strValue = '($' + strValue.replace(objRegExp,'') + ')';
      }
      else {
        strValue = '$' + strValue;
      }
      return  strValue;
    }
    else
      return strValue;
}

function removeCommas( strValue ) {
/************************************************
DESCRIPTION: Removes commas from source string.

PARAMETERS: 
  strValue - Source string from which commas will 
    be removed;

RETURNS: Source string with commas removed.
*************************************************/
  var objRegExp = /,/g; //search for commas globally
 
  //replace all matches with empty strings
  return strValue.replace(objRegExp,'');
}

function addCommas( strValue ) {
/************************************************
DESCRIPTION: Inserts commas into numeric string.

PARAMETERS: 
  strValue - source string containing commas.
  
RETURNS: String modified with comma grouping if
  source was all numeric, otherwise source is 
  returned.
  
REMARKS: Used with integers or numbers with
  2 or less decimal places.
*************************************************/
  var objRegExp  = new RegExp('(-?[0-9]+)([0-9]{3})'); 

    //check for match to search criteria
    while(objRegExp.test(strValue)) {
       //replace original string with first group match, 
       //a comma, then second group match
       strValue = strValue.replace(objRegExp, '$1,$2');
    }
  return strValue;
}

function removeCharacters( strValue, strMatchPattern ) {
/************************************************
DESCRIPTION: Removes characters from a source string
  based upon matches of the supplied pattern.

PARAMETERS: 
  strValue - source string containing number.
  
RETURNS: String modified with characters
  matching search pattern removed
  
USAGE:  strNoSpaces = removeCharacters( ' sfdf  dfd', 
                                '\s*')
*************************************************/
 var objRegExp =  new RegExp( strMatchPattern, 'gi' );
 
 //replace passed pattern matches with blanks
  return strValue.replace(objRegExp,'');
}


//function for validating credit card number

function is_valid_credit_card_number(cardNumber, cardType)//sample card type visa no 4992739871642 
{
  //alert(cardType);
  var isValid = false;
  var ccCheckRegExp = /[^\d ]/;
  isValid = !ccCheckRegExp.test(cardNumber);

  if (isValid)
  {
    var cardNumbersOnly = cardNumber.replace(/ /g,"");
    var cardNumberLength = cardNumbersOnly.length;
    var lengthIsValid = false;
    var prefixIsValid = false;
    var prefixRegExp;
	alert(cardType);
    switch(cardType)
    {
      case "mastercard","MasterCard":
        lengthIsValid = (cardNumberLength == 16);
        prefixRegExp = /^5[1-5]/;
        break;

      case "visa","Visa":
        lengthIsValid = (cardNumberLength == 16 || cardNumberLength == 13);
        prefixRegExp = /^4/;
        break;

      case "amex","Amex":
        lengthIsValid = (cardNumberLength == 15);
        prefixRegExp = /^3(4|7)/;
        break;
	  case "discover","Discover":
		lengthIsValid = (cardNumberLength == 16);
        prefixRegExp = /^6011/;
        break;  
      default:
        prefixRegExp = /^$/;
        alert("Card type not found");
    }

    prefixIsValid = prefixRegExp.test(cardNumbersOnly);
    isValid = prefixIsValid && lengthIsValid;
  }

  if (isValid)
  {
    var numberProduct;
    var numberProductDigitIndex;
    var checkSumTotal = 0;

    for (digitCounter = cardNumberLength - 1; 
      digitCounter >= 0; 
      digitCounter--)
    {
      checkSumTotal += parseInt (cardNumbersOnly.charAt(digitCounter));
      digitCounter--;
      numberProduct = String((cardNumbersOnly.charAt(digitCounter) * 2));
      for (var productDigitCounter = 0;
        productDigitCounter < numberProduct.length; 
        productDigitCounter++)
      {
        checkSumTotal += 
          parseInt(numberProduct.charAt(productDigitCounter));
      }
    }

    isValid = (checkSumTotal % 10 == 0);
  }
  //isValid=true;	
  return isValid;
}


/* nadesh validation starts here..*/


//function used to validate login form starts
function enter_key_for_directory_login_page(e,formname)
{
	if(e.keyCode==13)
	{
	 if (navigator.appName=="Netscape")
	 {
	  e.preventDefault();
	 }
	else
	  e.keyCode=0;
	  directory_login_validation(formname);
	}
}

function directory_login_validation(formname)
{		
	with(document.forms[formname])
	{

		if(trimAll(username.value)=="")
		{
			alert("Please enter username.");
			username.focus(); 
			return false;
		}
		else if(selectpw.value=="")
		{
			alert("Please enter password.");
			selectpw.focus(); 
			return false;
		}
		else
		{
			hdn_mode.value="login";
			submit();
			return true;
		}

	}
}
//function used to validate login form starts
function enter_key_for_directory_forget_page(e,formname)
{
	if(e.keyCode==13)
	{
	 if (navigator.appName=="Netscape")
	 {
	  e.preventDefault();
	 }
	else
	  e.keyCode=0;
	  directory_forgot_validation(formname);
	}
}

function directory_forgot_validation(formname){

	with(document.forms[formname])
	{
		if(emailaddress.value=="")
		{
			alert("Please enter your Email.");
			firstname.focus(); 
			return false;
		}
		else if(! validateEmail(emailaddress.value))
		{
			alert("Please Enter the Valid Email.");
			emailaddress.focus(); 
			return false;
		}
		
		hdn_mode.value="forgot";
		submit();
		return true;
	}
}
function mebership_validation(formname,mode){

	with(document.forms[formname])
	{
		if(firstname.value=="")
		{
			alert("Please enter your first name.");
			firstname.focus(); 
			return false;
		}
		else if(lastname.value=="")
		{
			alert("Please enter your last name.");
			lastname.focus(); 
			return false;
		}
		else if(address.value=="")
		{
			alert("Please enter Your address.");
			address.focus(); 
			return false;
		}
		else if(city.value=="")
		{
			alert("Please enter your city name.");
			city.focus(); 
			return false;
		}
		else if(zip.value=="")
		{
			alert("Please enter zip code.");
			zip.focus(); 
			return false;
		}
		else if(phone.value=="")
		{
			alert("Please enter phone number.");
			phone.focus(); 
			return false;
		}
		else if(email.value=="")
		{
			alert("Please enter Email.");
			email.focus(); 
			return false;
		}
		else if(! validateEmail(email.value))
		{
			alert("Please Enter the Valid Email.");
			email.focus(); 
			return false;
		}
		else if(username.value=="")
		{
			alert("Please enter username.");
			username.focus(); 
			return false;
		}
		else if(password.value=="")
		{
			alert("Please enter password.");
			password.focus(); 
			return false;
		}
		hid_mode.value=mode;
		submit();
		return true;
	}
}
function validate_search(formname)
{
	with(document.forms[formname])
	{
		if(companyname.value=="" &&  companycity.value=="" && companyzip.value=="" && companystate.value=="")
		{
			alert("Please select any one of serach criteria.");
			companyname.focus(); 
			return false;
		}
		hid_search.value="search";
		submit();
		return true;
		
	}
}

function memberappln_validation(formname,mode){

	with(document.forms[formname])
	{
		
		if(firstname.value=="")
		{
			alert("Please enter your first name.");
			firstname.focus(); 
			return false;
		}
		else if(lastname.value=="")
		{
			alert("Please enter your last name.");
			lastname.focus(); 
			return false;
		}
		if(companyname.value=="")
		{
			alert("Please enter your Firm  name.");
			companyname.focus(); 
			return false;
		}
		
		else if(companyaddress.value=="")
		{
			alert("Please enter Your company address.");
			companyaddress.focus(); 
			return false;
		}
		else if(companycity.value=="")
		{
			alert("Please enter your company city name.");
			companycity.focus(); 
			return false;
		}
		else if(companyzip.value=="")
		{
			alert("Please enter your company zip code.");
			companyzip.focus(); 
			return false;
		}
		else if(companyphone.value=="")
		{
			alert("Please enter your company phone number.");
			companyphone.focus(); 
			return false;
		}
		else if(companyemail.value=="")
		{
			alert("Please enter your company email address.");
			companyemail.focus(); 
			return false;
		}
		else if(! validateEmail(companyemail.value))
		{
			alert("Please Enter the Valid Email.");
			companyemail.focus(); 
			return false;
		}
		
		else if(companyfax.value=="")
		{
			alert("Please enter your company fax number.");
			companyfax.focus(); 
			return false;
		}
		else if(companyweb.value=="")
		{
			alert("Please enter your web site address.");
			companyweb.focus(); 
			return false;
		}
		else if(username.value=="")
		{
			alert("Please enter username.");
			username.focus(); 
			return false;
		}
		else if(password.value=="")
		{
			alert("Please enter password.");
			password.focus(); 
			return false;
		}
		if(confirm("Are you sure you want to update your profile?"))
		{
			hid_mode.value=mode;
			submit();
			return true;
		}
		else
		{
			return false;
		}
	}
}