function ValidateRequiredFields(frm, arr)
{
	for (i = 0; i < arr.length; i++)
	{
		var e = frm.elements[arr[i]];
		if (e.value.length <= 0)
			return false;
	}	
	return true;
}

function ValidateRegular(source, reg)
{
	value = source.value;
	if (value.length == 0)
		return true;
	var rx = new RegExp(reg);
	var matches = rx.exec(value);
    return (matches != null && value == matches[0]);
}


function ValidateEmail(source)
{
	if  (!ValidateRegular(source, "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}

function ValidatePhone(source)
{
	if (!ValidateRegular(source, "((\\(\\d{3}\\) ?)|(\\d{3}-))?\\d{3}-\\d{4}"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}

function IsInteger(source)
{
	if (!ValidateRegular(source, "\\d*"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}

function ValidateURL(source)
{
	if (!ValidateRegular(source, "((\\(\\d{3}\\) ?)|(\\d{3}-))?\\d{3}-\\d{4}"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}

/*************************************************************************\
CheckCardNumber(form)
function called when users click the "check" button.
\*************************************************************************/

// validate credit card number
var Cards = new makeArray(8);
Cards[0] = new CardType("MasterCard", "51,52,53,54,55", "16");
var MasterCard = Cards[0];
Cards[1] = new CardType("VisaCard", "4", "13,16");
var VisaCard = Cards[1];
Cards[2] = new CardType("AmExCard", "34,37", "15");
var AmExCard = Cards[2];
Cards[3] = new CardType("DiscoverCard", "6011", "16");
var DiscoverCard = Cards[3];


Cards[4] = new CardType("DinersClubCard", "30,36,38", "14");
var DinersClubCard = Cards[4];
Cards[5] = new CardType("enRouteCard", "2014,2149", "15");
var enRouteCard = Cards[5];
Cards[6] = new CardType("JCBCard", "3088,3096,3112,3158,3337,3528", "16");
var JCBCard = Cards[6];
var LuhnCheckSum = Cards[7] = new CardType();

/*************************************************************************\
CheckCardNumber(form)
function called when users click the "check" button.
\*************************************************************************/
function CheckCardNumber(iCardType, strCardNum, strCardExpMonth, strCardExpYear) 
{
	var tmpyear;
	
	var today = new Date();
	var strReturnValue = "";
	if (strCardExpYear < today.getYear())
	{
		//strReturnValue = strReturnValue + "The Expiration Year is not valid. It must be greater than or equals " + today.getYear();
		//return strReturnValue;
	}
	tmpyear = strCardExpYear;
		
	var tmpmonth;
	tmpmonth  = strCardExpMonth;
			
	// The following line doesn't work in IE3, you need to change it
	// to something like "(new CardType())...".
	 //if (!CardType().isExpiryDate(tmpyear, tmpmonth)) 
	if (!(new CardType()).isExpiryDate(tmpyear, tmpmonth)) 
	{
		//strReturnValue = strReturnValue + "This card has already expired.";
		//return strReturnValue;
	}
	
	
	var card = Cards[iCardType].getCardType();
	var retval = Cards[iCardType].checkCardNumber(strCardNum,tmpyear,tmpmonth);
	cardname = "";
	if (retval)
		return "";
	else 
	{
		// The cardnumber has the valid luhn checksum, but we want to know which
		// cardtype it belongs to.
		for (var n = 0; n < Cards.size; n++) 
		{
			if (Cards[n].checkCardNumber(strCardNum, tmpyear, tmpmonth)) 
			{
				cardname = Cards[n].getCardType();
				break;
			}
		}
		
		if (cardname.length > 0) 
		{
			strReturnValue = strReturnValue + "This looks like a " + cardname + " number, not a " + card + " number.";
			return strReturnValue;
		}
		else 
		{
			return "Your credit card number is not valid. Please re-enter!";
		}
   }
}
/*************************************************************************\
Object CardType([String cardtype, String rules, String len, int year, 
                                        int month])
cardtype    : type of card, eg: MasterCard, Visa, etc.
rules       : rules of the cardnumber, eg: "4", "6011", "34,37".
len         : valid length of cardnumber, eg: "16,19", "13,16".
year        : year of expiry date.
month       : month of expiry date.
eg:
var VisaCard = new CardType("Visa", "4", "16");
var AmExCard = new CardType("AmEx", "34,37", "15");
\*************************************************************************/
function CardType() 
{
	var n;
	var argv = CardType.arguments;
	var argc = CardType.arguments.length;
	
	this.objname = "object CardType";
	
	var tmpcardtype = (argc > 0) ? argv[0] : "CardObject";
	var tmprules = (argc > 1) ? argv[1] : "0,1,2,3,4,5,6,7,8,9";
	var tmplen = (argc > 2) ? argv[2] : "13,14,15,16,19";
	
	this.setCardNumber = setCardNumber;  // set CardNumber method.
	this.setCardType = setCardType;  // setCardType method.
	this.setLen = setLen;  // setLen method.
	this.setRules = setRules;  // setRules method.
	this.setExpiryDate = setExpiryDate;  // setExpiryDate method.
	
	this.setCardType(tmpcardtype);
	this.setLen(tmplen);
	this.setRules(tmprules);
	if (argc > 4)
		this.setExpiryDate(argv[3], argv[4]);
	
	this.checkCardNumber = checkCardNumber;  // checkCardNumber method.
	this.getExpiryDate = getExpiryDate;  // getExpiryDate method.
	this.getCardType = getCardType;  // getCardType method.
	this.isCardNumber = isCardNumber;  // isCardNumber method.
	this.isExpiryDate = isExpiryDate;  // isExpiryDate method.
	this.luhnCheck = luhnCheck;// luhnCheck method.
	return this;
}

/*************************************************************************\
boolean checkCardNumber([String cardnumber, int year, int month])
return true if cardnumber pass the luhncheck and the expiry date is
valid, else return false.
\*************************************************************************/
function checkCardNumber() 
{
	var argv = checkCardNumber.arguments;
	var argc = checkCardNumber.arguments.length;
	var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
	var year = (argc > 1) ? argv[1] : this.year;
	var month = (argc > 2) ? argv[2] : this.month;

	this.setCardNumber(cardnumber);
	this.setExpiryDate(year, month);

	if (!this.isCardNumber())
		return false;
		
	//if (!this.isExpiryDate())
	//	return false;
	return true;
}
/*************************************************************************\
String getCardType()
return the cardtype.
\*************************************************************************/
function getCardType() 
{
	return this.cardtype;
}
/*************************************************************************\
String getExpiryDate()
return the expiry date.
\*************************************************************************/
function getExpiryDate() 
{
	return this.month + "/" + this.year;
}
/*************************************************************************\
boolean isCardNumber([String cardnumber])
return true if cardnumber pass the luhncheck and the rules, else return
false.
\*************************************************************************/
function isCardNumber() 
{
	var argv = isCardNumber.arguments;
	var argc = isCardNumber.arguments.length;
	var cardnumber = (argc > 0) ? argv[0] : this.cardnumber;
	if (!this.luhnCheck())
	{
		return false;
	}
	for (var n = 0; n < this.len.size; n++)
	{	
		
		if (parseInt(cardnumber.toString().length,10) == parseInt(this.len[n],10)) 
		{
			for (var m = 0; m < this.rules.size; m++) 
			{
				var headdigit = cardnumber.substring(0, this.rules[m].toString().length);
				if (headdigit == this.rules[m])
					return true;
			}
			return false;
		}
	}
	return false;
}

/*************************************************************************\
boolean isExpiryDate([int year, int month])
return true if the date is a valid expiry date,
else return false.
\*************************************************************************/
function isExpiryDate() 
{
	var argv = isExpiryDate.arguments;
	var argc = isExpiryDate.arguments.length;

	year = argc > 0 ? argv[0] : this.year;
	month = argc > 1 ? argv[1] : this.month;

	if (!isNum(year+""))
		return false;
	if (!isNum(month+""))
		return false;
	today = new Date();
	expiry = new Date(year, month);
	if (today.getTime() > expiry.getTime())
		return false;
	else
		return true;
}

/*************************************************************************\
boolean isNum(String argvalue)
return true if argvalue contains only numeric characters,
else return false.
\*************************************************************************/
function isNum(argvalue) 
{
	argvalue = argvalue.toString();

	if (argvalue.length == 0)
	return false;

	for (var n = 0; n < argvalue.length; n++)
		if (argvalue.substring(n, n+1) < "0" || argvalue.substring(n, n+1) > "9")
			return false;
	return true;
}

/*************************************************************************\
boolean luhnCheck([String CardNumber])
return true if CardNumber pass the luhn check else return false.
Reference: http://www.ling.nwu.edu/~sburke/pub/luhn_lib.pl
\*************************************************************************/
function luhnCheck() 
{
	var argv = luhnCheck.arguments;
	var argc = luhnCheck.arguments.length;

	var CardNumber = argc > 0 ? argv[0] : this.cardnumber;

	if (! isNum(CardNumber)) 
	{
		return false;
	}

	var no_digit = CardNumber.length;
	var oddoeven = no_digit & 1;
	var sum = 0;

	for (var count = 0; count < no_digit; count++) 
	{
		var digit = parseInt(CardNumber.charAt(count));
		if (!((count & 1) ^ oddoeven)) 
		{
			digit *= 2;
			if (digit > 9)
			digit -= 9;
		}
		sum += digit;
	}
	if (sum % 10 == 0)
		return true;
	else
		return false;
}

/*************************************************************************\
ArrayObject makeArray(int size)
return the array object in the size specified.
\*************************************************************************/
function makeArray(size) 
{
	this.size = size;
	return this;
}

/*************************************************************************\
CardType setCardNumber(cardnumber)
return the CardType object.
\*************************************************************************/
function setCardNumber(cardnumber) 
{
	this.cardnumber = cardnumber;
	return this;
}

/*************************************************************************\
CardType setCardType(cardtype)
return the CardType object.
\*************************************************************************/
function setCardType(cardtype) 
{
	this.cardtype = cardtype;
	return this;
}

/*************************************************************************\
CardType setExpiryDate(year, month)
return the CardType object.
\*************************************************************************/
function setExpiryDate(year, month) 
{
	this.year = year;
	this.month = month;
	return this;
}

/*************************************************************************\
CardType setLen(len)
return the CardType object.
\*************************************************************************/
function setLen(len) 
{
	// Create the len array.
	if (len.length == 0 || len == null)
		len = "13,14,15,16,19";

	var tmplen = len;
	n = 1;
	while (tmplen.indexOf(",") != -1) 
	{
		tmplen = tmplen.substring(tmplen.indexOf(",") + 1, tmplen.length);
		n++;
	}
	this.len = new makeArray(n);
	n = 0;
	while (len.indexOf(",") != -1) 
	{
		var tmpstr = len.substring(0, len.indexOf(","));
		this.len[n] = tmpstr;
		len = len.substring(len.indexOf(",") + 1, len.length);
		n++;
	}
	this.len[n] = len;
	return this;
}

/*************************************************************************\
CardType setRules()
return the CardType object.
\*************************************************************************/
function setRules(rules) 
{
	// Create the rules array.
	if (rules.length == 0 || rules == null)
		rules = "0,1,2,3,4,5,6,7,8,9";
	  
	var tmprules = rules;
	n = 1;
	while (tmprules.indexOf(",") != -1) 
	{
		tmprules = tmprules.substring(tmprules.indexOf(",") + 1, tmprules.length);
		n++;
	}
	
	this.rules = new makeArray(n);
	n = 0;
	
	while (rules.indexOf(",") != -1) 
	{
		var tmpstr = rules.substring(0, rules.indexOf(","));
		this.rules[n] = tmpstr;
		rules = rules.substring(rules.indexOf(",") + 1, rules.length);
		n++;
	}
	this.rules[n] = rules;
	return this;
}




//////////////////////////////////////
//VKAlbum, Inc Script code
////////////////////////////////////
/////////////////////////////////////////////////////////////////
//This function is check require field for a textbox
///////////////////////////////////////////////////////////
function VKCheckRequireField(object,strMesssage){
	if(object.value.length == 0){
		object.focus();
		return strMesssage;
		
	}
	else{
		return "";
	}
}
////////////////////////////////////////////////////////////////////////
//This function is check for compare 2 control
///////////////////////////////////////////////////////////////////////
function VKCheckCompareField(objControl1,objControl2,strMessage){
	if(objControl1.value != objControl2.value){
		objControl2.focus()
		return strMessage;
	}
	else{
		return "";
	}
}
///////////////////////////////////////////////////
//This function is check email but it only return a message
////////////////////////////////////////////////////////
function VKCheckEmail(object,strMessage){
	if(object.value.length > 0){
		if(ValidateEmail(object)){
			return "";
		}
		else
		{
			object.focus();
			return strMessage
		}
	}
	else{
		return "";
	}
}
///////////////////////////////////////////////////
//This function is check zipcode but it only return a message
////////////////////////////////////////////////////////
function VKValidateZipCode(source)
{
	if (!ValidateRegular(source, "\\d{5}(-\\d{4})?"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}
///////////////////////////////////////////////////
//This function is check website but it only return a message
////////////////////////////////////////////////////////
function VKValidateWebsite(object, strMessage)
{
	if(object.value.length > 0){
		if(ValidateWebsite(object)){
			return "";
		}
		else
		{
			return strMessage
			object.focus();
		}
	}
	else{
		return "";
	}
}
function VKValidateDomainName(object, strMessage)
{
	if(object.value.length > 0){
		if(ValidateDomainName(object)){
			return "";
		}
		else
		{
			return strMessage
			object.focus();
		}
	}
	else{
		return "";
	}
}

function ValidateWebsite(source)
{
	if (!ValidateRegular(source, "(http://)?([\\w-]+\\.)+[\\w-]+(/[\\w- ./?%&=]*)?"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}
function ValidateUserName(source)
{
	if (!ValidateRegular(source, "(\\w+([-+]\\w+)*"))
	{
		source.select();
		source.focus();
		return false;
	}
	return true;
}
/////////////////////////////////////////////////////////
function VKCheckUserName(object,strMessage){
	if(object.value.length > 0){
		if(ValidateUserName(object)){
			return "";
		}
		else
		{
			return strMessage
			object.focus();
		}
	}
	else{
		return "";
	}
}
/////////////////////////////////////////////////////////
function VKCheckPhone(object,strMessage){
	if(object.value.length > 0){
		if(ValidatePhone(object)){
			return "";
		}
		else
		{
			return strMessage
			object.focus();
		}
	}
	else{
		return "";
	}
}
/////////////////////////////////////////////////////////////////////
function VKCheckZipCode(object,strMessage){
	if(object.value.length > 0){
		if(VKValidateZipCode(object)){
			return "";
		}
		else
		{
			object.focus();
			return strMessage;
			
		}
	}
	else{
		return "";
	}
}
//////////////////////////////////////////////////////////////////
function VKCheckCombo(object,strMessage){
	if(object.selectedIndex == 0){
		return strMessage
		object.focus();
	}
	else{
		return "";
	}
}
//////////////////////////////////////////////////////////////////
function VKCheckListBox(object,strMessage){
	if(object.length == 0){
		return strMessage
		object.focus();
	}
	else{
		return "";
	}
}
function VK2CheckListBox(object1, object2, strMessage)
{
	if((VKCheckListBox(object1, strMessage).length > 0) && (VKCheckListBox(object2, strMessage).length > 0))
	{
		return strMessage;
	}
	else{
		return "";
	}
}
////////////////////////////////////////////////////////////////////////
//This function is check for require file
///////////////////////////////////////////////////////////////////////

function VKCheckFileExtension(strFile,strMessage,strFileExtension ){
	if(strFile)
	{
		return true;
	}
	else{
		if(checkFile(strFile, strFileExtension))
		{
			return true;
		}
		else
		{			
			return false;
		}
	}
}
////////////////////////////////////////////////////////////////////////
//This function is check for require file
///////////////////////////////////////////////////////////////////////

function CheckType(objControl,strMessage,strFileExtension ){
	if(objControl.value == "")
	{
		return "";
	}
	else{
		if(checkFile(objControl.value, strFileExtension))
		{
			return "";
		}
		else
		{
			objControl.select();
			objControl.focus();
			return strMessage;
		}
	}
}

////////////////////////////////////////////////////////////////////////
//This function is check for require file
///////////////////////////////////////////////////////////////////////
	function checkFile(strValue, strFileExtension)
	{
		var strExtension = strValue.substr((strValue.lastIndexOf(".") + 1), strValue.length);
		var arrExtension = strFileExtension.split(",");
		var bFound = false;
		for(var i = 0; i < arrExtension.length;i++)
		{
			if(strExtension.toLowerCase() == arrExtension[i].toLowerCase())
			{
				bFound = true;
			}
		}
		return bFound;
	}
/////////////////////////////////////////////////////////////
// End of  code
///////////////////////////////////////////////////////