// Credit card validation routines 
                   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", "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(form) {
                       var tmpyear;
                       if (form.ccNumber.value.length == 0) {
                       alert("Please enter a Card Number.");
                       form.ccNumber.focus();
                       return;
                       }
                       /*if (form.ExpYear.value.length == 0) {
                           alert("Please enter the Expiration Year.");
                           form.ExpYear.focus();
                           return;
                       }*/
                       if (form.ExpYear.options[form.ExpYear.options.selectedIndex].value > 96)
                           tmpyear = "19" + form.ExpYear.options[form.ExpYear.options.selectedIndex].value;
                       else if (form.ExpYear.options[form.ExpYear.options.selectedIndex].value < 21)
                           tmpyear = "20" + form.ExpYear.options[form.ExpYear.options.selectedIndex].value;
                       else {
                           alert("The Expiration Year is not valid.");
                           return;
                       }
                       tmpmonth = form.ExpMonth.options[form.ExpMonth.selectedIndex].value;
                       // The following line doesnt work in IE3, you need to change it
                       // to something like "(new CardType())...".
                        //if (!CardType().isExpiryDate(tmpyear, tmpmonth)) {

                       if (!(new CardType()).isExpiryDate(tmpyear, tmpmonth)) {
                           alert("This card has already expired.");
                           return;
                       }
                       card = form.CCType.options[form.CCType.selectedIndex].value;
                       var retval = eval(card + ".checkCardNumber(\"" + form.ccNumber.value +
                       "\", " + tmpyear + ", " + tmpmonth + ");");
                       cardname = "";
                       if (retval)

                       return true;

                       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(form.ccNumber.value, tmpyear, tmpmonth)) {
                                   cardname = Cards[n].getCardType();
                                   break;
                               }
                           }
                           if (cardname.length > 0) {
                               alert("This looks like a " + cardname + " number, not a " + card + " number.");
                           }
                           else {
                               alert("This card number is not valid.");
                               }
                       }
                   }
                   /*************************************************************************\
                   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;
                   }
                   
                   

                   function setGiftState(state) {
                    document.magPromo.giftSubscribe = state;
                   }

                   // Forms validation
                   function validateForm() {
                       // subscriber info
                    if (document.magPromo.custFirstName.value == "") {
                           alert("Please enter subscriber first name.");
                           document.magPromo.custFirstName.focus();
                           return false;
                       }
                       if (document.magPromo.custLastName.value == "") {
                           alert("Please enter subscriber last name.");
                           document.magPromo.custLastName.focus();
                           return false;
                       }
                    if (document.magPromo.address1.value == "") {
                           alert("Please enter subscriber address.");
                           document.magPromo.address1.focus();
                           return false;
                       }
                    if (document.magPromo.city.value == "") {
                           alert("Please enter subscriber city.");
                           document.magPromo.city.focus();
                           return false;
                       }
                    if (document.magPromo.state.value == "") {
                           alert("Please select subscriber state.");
                           document.magPromo.state.focus();
                           return false;
                       }
                    if (document.magPromo.zip.value == "") {
                           alert("Please enter subscriber zip code.");
                           document.magPromo.zip.focus();
                           return false;
                       }
                    if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(document.magPromo.email.value)){;}
                       else {
                           alert("Please enter a valid subscriber email address.");
                           document.magPromo.email.focus();
                           return false;
                       }

                    // gift certificate info - optional
                    if(document.magPromo.giftSubscribe.checked) {
                        if (document.magPromo.giftFirstName.value == "") {
                            alert("Please enter gift subscription first name.");
                            document.magPromo.giftFirstName.focus();
                            return false;
                        }
                        if (document.magPromo.giftLastName.value == "") {
                            alert("Please enter gift subscription last name.");
                            document.magPromo.giftLastName.focus();
                            return false;
                        }
                        if (document.magPromo.giftAddress.value == "") {
                            alert("Please enter gift subscription address.");
                            document.magPromo.giftAddress.focus();
                            return false;
                        }
                        if (document.magPromo.giftCity.value == "") {
                            alert("Please gift subscription city.");
                            document.magPromo.giftCity.focus();
                            return false;
                        }
                        if (document.magPromo.giftState.value == "") {
                            alert("Please select a gift subscription state.");
                            document.magPromo.giftState.focus();
                            return false;
                        }
                        if (document.magPromo.giftZip.value == "") {
                            alert("Please enter a gift subscription zip code.");
                            document.magPromo.giftZip.focus();
                            return false;
                        }
                    }

                    // credit card info.
                    if (document.magPromo.custNameBilling.value == "") {
                           alert("Please enter billing address name.");
                           document.magPromo.custNameBilling.focus();
                           return false;
                     }

                     var spacer =  document.magPromo.custNameBilling.value;
                     if (spacer.indexOf(" ") == -1 || spacer.indexOf(" ") == 0 || spacer.lastIndexOf(" ") == spacer.length-1){
                           alert("The name on your card must contain a space between your first, middle, and last name with no space before and after the name.");
                           document.magPromo.custNameBilling.focus();
                           return false;
                     }

                    if (document.magPromo.addressBilling.value == "") {
                           alert("Please enter your billing address.");
                           document.magPromo.addressBilling.focus();
                           return false;
                       }
                    if (document.magPromo.cityBilling.value == "") {
                           alert("Please enter billing address city.");
                           document.magPromo.cityBilling.focus();
                           return false;
                       }
                    if (document.magPromo.stateBilling.value == "") {
                           alert("Please select a billing address state.");
                           document.magPromo.stateBilling.focus();
                           return false;
                       }
                    if (document.magPromo.zipBilling.value == "") {
                           alert("Please enter a billing address zip code.");
                           document.magPromo.zipBilling.focus();
                           return false;
                       }
                    if (document.magPromo.countryBilling.value == "") {
                           alert("Please enter a billing address country.");
                           document.magPromo.countryBilling.focus();
                           return false;
                       }
                    if (document.forms[0].phoneBilling.value.length < 10) {
                           alert("Please enter a valid phone number, including area code.");
                           document.forms[0].phoneBilling.focus();
                           return false;
                       }

                    if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/.test(document.magPromo.emailBilling.value)){;}
                       else {
                           alert("Please enter a valid billing address email address.");
                           document.magPromo.emailBilling.focus();
                           return false;
                       }
                    if(!CheckCardNumber(document.forms[0])){
                              return false;
                       }

                       if (document.forms[0].cvv2.value.length < 3 || document.forms[0].cvv2.value.length > 4 || !isNum(document.forms[0].cvv2.value)) {
                           alert("Please enter the cvv2 number from your credit card.");
                           document.forms[0].cvv2.focus();
                           cvvPopup();
                           return false;
                       }

                       //showLayer("hideSubmit", "hide");
                       hideSubmit.style.display="none";
                       showLayer("showProcess", "show");
                       window.location.href = "#";

                       return true;
                   }