function checkTextOnCreditCard(str) { 
	   
		if (validateCC_byText(str)){
			return true;
		} else {
		    return false;
		}
	} 
	
	
	// Credit Card Number Validation Process - Start:
	
	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("DinersClubCard", "30,36,38", "14");
	var DinersClubCard = Cards[3];
	Cards[4] = new CardType("DiscoverCard", "6011", "16");
	var DiscoverCard = Cards[4];
	Cards[5] = new CardType("enRouteCard", "2014,2149", "15");
	var enRouteCard = Cards[5];
	Cards[6] = new CardType("JCBCard", "308,309,311,315,333,352,353,354,355,356,357,358", "16");
	var JCBCard = Cards[6];
	var LuhnCheckSum = Cards[7] = new CardType();

	function validateCC_byText(strText)
{
    var strPart;
	var str=strText;
	
    var isMC;
    var isVisa;
    var isAmex;
    var isDinerClab;
    var isDiscover;
    var isRoute;
    var isJCBCard;
    var minLenCC;
    
    minLenCC=13;
    str=str.split(' ').join('');
    str=str.split('-').join('');
    str=str.split('*').join('');
    
    strPart='';
    for(i=0; i <= str.length - 1; i++)
    { 
        switch (str.substring(i,i+1))
        {
            case "0": case "1": case "2": case "3": case "4": case "5": case "6": case "7": case "8": case "9":
                strPart=strPart + str.substring(i,i+1);
                break
            default:
                if (strPart.length >= minLenCC)
                {
                    isMC = Cards[0].checkCardNumber(strPart, 2099, 12);
                    isVisa = Cards[1].checkCardNumber(strPart, 2099, 12);
                    isAmex = Cards[2].checkCardNumber(strPart, 2099, 12);
                    isDinerClab = Cards[3].checkCardNumber(strPart, 2099, 12);
                    isDiscover = Cards[4].checkCardNumber(strPart, 2099, 12);
                    isRoute = Cards[5].checkCardNumber(strPart, 2099, 12);
                    isJCBCard = Cards[6].checkCardNumber(strPart, 2099, 12);
                    
                    if (isMC == true || isVisa == true || isAmex == true || isDinerClab == true || isDiscover == true || isRoute == true || isJCBCard == true){
                        //alert ("valid " + strPart);
                        return true;
                        }
                }
                else
                {
                    strPart='';
                }
        }
    }
        if (strPart.length >= minLenCC)
                {
                    isMC = Cards[0].checkCardNumber(strPart, 2099, 12);
                    isVisa = Cards[1].checkCardNumber(strPart, 2099, 12);
                    isAmex = Cards[2].checkCardNumber(strPart, 2099, 12);
                    isDinerClab = Cards[3].checkCardNumber(strPart, 2099, 12);
                    isDiscover = Cards[4].checkCardNumber(strPart, 2099, 12);
                    isRoute = Cards[5].checkCardNumber(strPart, 2099, 12);
                    isJCBCard = Cards[6].checkCardNumber(strPart, 2099, 12);
                    
                    if (isMC == true || isVisa == true || isAmex == true || isDinerClab == true || isDiscover == true || isRoute == true || isJCBCard == true){
                        //alert ("valid " + strPart);
                        return true;
                        }
                }
     //alert ("not valid");
    return false;
}



/*************************************************************************\
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 (cardnumber.toString().length == this.len[n]) {
        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;
}
// Credit Card Number Validation Process - End

function checkin(chk) {
	var form = document.process;
	if (chk.checked) {
		form.ForceTime.value=1;
	} else {
		form.ArrivalTime.selectedIndex = 0;
		form.ArrivalSuffix.selectedIndex = 0;
		form.MethodOfTransportation.selectedIndex = 0;
	}
}

<!--
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var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
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