function getObject(whichLayer) {
		if(document.getElementById)
			elem=document.getElementById(whichLayer);
		else if (document.all)
			elem=document.all[whichLayer];
		else if (document.layers)
			elem=document.layers[whichLayer];
			
		return elem;
	}

function open_vpk(vpk_url) {
	
		open_vpk_popup(vpk_url, 'epk', 800, 820, 20, 40, 'no', 'yes', 'no');
	}
	
	function open_vpk_popup(vpk_url){
		var sName, sWidth, sHeight, sXpos, sYpos, sScroll, sResize;
		
		sName = 'popup';
		sWidth = '800';
		sHeight = '750';
		sXpos = '20';
		sYpos = '40';
		sScroll = 'no';
		sResize = 'no';
		sWinbars = 'no';
		
		//handled agruments if they are left blank
		if (open_vpk_popup.arguments.length > 1)
		sName = open_vpk_popup.arguments[1];
		if (open_vpk_popup.arguments.length > 2)
		sWidth = open_vpk_popup.arguments[2];
		if (open_vpk_popup.arguments.length > 3)
		sHeight = open_vpk_popup.arguments[3];
		if (open_vpk_popup.arguments.length > 4)
		sXpos = open_vpk_popup.arguments[4];
		if (open_vpk_popup.arguments.length > 5)
		sYpos = open_vpk_popup.arguments[5];
		if (open_vpk_popup.arguments.length > 6)
		sScroll = open_vpk_popup.arguments[6];
		if (open_vpk_popup.arguments.length > 7)
		sResize = open_vpk_popup.arguments[7];
		if (open_vpk_popup.arguments.length > 8)
		sWinbars = open_vpk_popup.arguments[8];
		
		var winBars;
		if (sWinbars=='no')
			winBars = 'directories=no,location=no,menubar=no,status=no,titlebar=no,toolbar=no';
		else
			winBars = 'directories=yes,location=yes,menubar=yes,status=yes,titlebar=yes,toolbar=yes';
		
		var winOptions = 'scrollbars='+ sScroll + ',resizable='+ sResize;
		var winSize = 'height=' + sHeight + ',width=' + sWidth;
		var winPosition = 'left=' + sXpos + ',top=' + sYpos;
		var winFeatures = winBars + ',' + winOptions + ',' + winSize + ',' + winPosition;
		
		var theWindow = window.open(vpk_url,sName,winFeatures);
		if (theWindow == null)
		{
			alert('Unable to open a new window.');
		}
		else
		{
			theWindow.focus();
		}
		
		//return theWindow;
	}
	
	
	function getRadioButtonValue(radioObj) {
		if(!radioObj)
			return "";
		var radioLength = radioObj.length;
		if(radioLength == undefined)
			if(radioObj.checked)
				return radioObj.value;
			else
				return "";
		for(var i = 0; i < radioLength; i++) {
			if(radioObj[i].checked) {
				return radioObj[i].value;
			}
		}
		return "";
	}
	
	function getObject(whichLayer) {
		if(document.getElementById)
			elem=document.getElementById(whichLayer);
		else if (document.all)
			elem=document.all[whichLayer];
		else if (document.layers)
			elem=document.layers[whichLayer];
			
		return elem;
	}
	
	var form_error = false;
	var form_error_message = "";

	function getXmlHttpRequestObject() {
		if (window.XMLHttpRequest) {
			return new XMLHttpRequest();
		} else if(window.ActiveXObject) {
			return new ActiveXObject("Microsoft.XMLHTTP");
		} else {
			document.getElementById('output').innerHTML = 'Status: Cound not create XmlHttpRequest Object.  Consider upgrading your browser.';
		}
	}



	function check_confirm(field1, field2, field_size, message) {
		check_input(field1, field_size, message);
		if (field1.value != field2.value) {
			form_error_message = "Please check that '" + message + "' and 'Confirm " +  message + "' match.\n\n" + form_error_message;
			form_error = true;
		}
	}

	function check_input(field_name, field_size, message) {
		var field_value = field_name.value;
	
		if (field_value.length < field_size) {
		  form_error_message = form_error_message + "* " + message + "\n";
		  form_error = true;
		}
	}
	
	
	function check_email(field_name, message) {
		var str = field_name.value;
		var at="@";
		var dot=".";
		var lat=str.indexOf(at);
		var lstr=str.length;
		var ldot=str.indexOf(dot);
		var valid=true;

		if (str.indexOf(at)==-1) valid = false;
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr) valid = false;
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr) valid = false;
		if (str.indexOf(at,(lat+1))!=-1) valid = false;
		if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot) valid = false;
		if (str.indexOf(dot,(lat+2))==-1) valid = false;
		if (str.indexOf(" ")!=-1) valid = false;

		if (valid==false) {
			form_error_message =  message + " does not appear to be a valid email address.\n\n" + form_error_message;
			form_error = true;
		}
	}
	
	


<!-- Begin
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(card_number) {
	//var tmpyear;

	if (card_number.length == 0) {
		return false;
	}

/*
	if (card_number.value.length == 0) {
		alert("Please enter a Card Number.");
		form.CardNumber.focus();
		return;
	}

	if (form.ExpYear.value.length == 0) {
		alert("Please enter the Expiration Year.");
		form.ExpYear.focus();
		return;
	}

	if (form.ExpYear.value > 96)
		tmpyear = "19" + form.ExpYear.value;
	else if (form.ExpYear.value < 21)
		tmpyear = "20" + form.ExpYear.value;
	else {
		alert("The Expiration Year is not valid.");
		return;
	}
	tmpmonth = form.ExpMon.options[form.ExpMon.selectedIndex].value;
	// 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)) {
		alert("This card has already expired.");
		return;
	}
	
	
	card = form.CardType.options[form.CardType.selectedIndex].value;
	var retval = eval(card + ".checkCardNumber(\"" + form.CardNumber.value +
	"\", " + tmpyear + ", " + tmpmonth + ");");
	cardname = "";
	if (retval)
	
		
	// comment this out if used on an order form
	//alert("This card number appears to be valid.");
	return true;
	
	
	else {
	*/
	// The cardnumber has the valid luhn checksum, but we want to know which
	// cardtype it belongs to.
		cardname="";
		for (var n = 0; n < Cards.size; n++) {
			if (Cards[n].checkCardNumber(card_number)) {
				cardname = Cards[n].getCardType();
				break;
			}
		}
		if (cardname.length > 0) {
			//alert("This looks like a " + cardname + " number, not a " + card + " number.");
			return true;
		} else {
			//alert("This card number is 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;
}
//  End -->