Order Form Won’t Update

I took over this website a little while back. The order form will only update the first three products, and that’s only if I comment out the getTaxRate function. It doesn’t update the Final Total either. I’ve made some attempt at getting it to work but ended up pulling my hair out. I’m not too familiar with javascript, but it seems like the code was written poorly. I would appreciate any help.

Here is the form: [URL=”http://rcamodels.com/rcatest/ordernow.html”]Link[/URL]

Here is the Javascript:

[CODE]
// @@@@@ SALES ORDER SCRIPTS Start @@@@@
/*
Return Codes
————————-
0 – Success
1 – Error: Check sum failed
10 – Error: Too Few digits
11 – Error: Invalid Prefix
12 – Error: Incorrect Number of digits
13 – Error: Unsupported card type
*/
function validateCCard( nCardNum, strCardType)
{
// returns 0 if valid, positive number if invalid.
nTotal = 1*0;
nOff = 1*0;

nNumber = “”;

// Remove any non-numeric values from this number.
for( i = 0; i < nCardNum.length; i++ )
if ( nCardNum.charAt(i) >= “0” && nCardNum.charAt(i) <= “9” )
nNumber = nNumber + nCardNum.charAt(i);

nFirstNum = “” + nNumber.charAt(0);
nSecondNum = “” + nNumber.charAt(1);
nThirdNum = “” + nNumber.charAt(2);
nFirstTwoDigits = nFirstNum + nSecondNum;
nFirstFourDigits = nFirstTwoDigits + nThirdNum + nNumber.charAt(3);

if ( strCardType == “MasterCard” )
{
if ( nFirstNum != “5” || nSecondNum < “1” || nSecondNum > “5” )
return 11; // invalid prefix

if(nNumber.length != 16)
return 12; // Incorrect number of digits
}
else if(strCardType == “Visa”)
{
if(nFirstNum != “4”)
return 11; // invalid prefix

if(nNumber.length != 13 && nNumber.length != 16)
return 12; // Incorrect number of digits
}
else if(strCardType == “American Express”)
{
if(nFirstNum != “3” || (nSecondNum != “4” && nSecondNum != “7”))
return 11; // invalid Prefix

if(nNumber.length != 15)
return 12; // Incorrect number of digits
}
else if(strCardType == “Discover”)
{
if( nFirstFourDigits != “6011” )
return 11; // invalid prefix.

if( nNumber.length != 16 )
return 12; // Incorrect number of digits
}
else if(strCardType == “Diner”s Club”)
{
if ( nFirstTwoDigits != “36” && nFirstTwoDigits != “38” &&
(nFirstTwoDigits != “30” || (nThirdNum < “0” || nThirdNum > “5”)))
{
return 11; // invalid prefix.
}
if ( nNumber.length != 14 )
return 12; // Incorrect number of digits
}
else
return 13; // Card type not supported

// No card is less than 13 characters
if ( nNumber.length < 13 )
return 10;

// now check the credit card suffix and length vs. the type

// do the checksum
for ( loc = nNumber.length – 2; loc >= 0; loc -= 2 )
{
nTotal += 1 * nNumber.charAt(loc +1);
nOff = nNumber.charAt(loc) * 2;
if ( nOff > 9 )
nTotal += 1;
nTotal += (nOff % 10);
}

if( nNumber.length % 2 > 0 )
nTotal += 1 * nNumber.charAt(0);

if ( ( nTotal % 10 ) != 0 )
return 1; // Checksum failure

return 0; // Okey Dokey!
}
function formatCurrency(nAmount)
{
//– Returns passed number as string in $xxx,xxx.xx format.
nAmount=eval(nAmount)
workNum=Math.abs((Math.round(nAmount*100)/100));workStr=””+workNum
if (workStr.indexOf(“.”)==-1){workStr+=”.00″}
dStr=workStr.substr(0,workStr.indexOf(“.”));dNum=dStr-0
pStr=workStr.substr(workStr.indexOf(“.”))
while (pStr.length<3){pStr+=”0″}

//— Adds comma in thousands place.
if (dNum>=1000)
{
dLen=dStr.length
dStr=parseInt(“”+(dNum/1000))+”,”+dStr.substring(dLen-3,dLen)
}

//– Adds comma in millions place.
if (dNum>=1000000)
{
dLen=dStr.length
dStr=parseInt(“”+(dNum/1000000))+”,”+dStr.substring(dLen-7,dLen)
}
retval = dStr + pStr
//– Put numbers in parentheses if negative.
if (nAmount<0) {retval=”(“+retval+”)”}
return “$”+retval
}

function getTaxRate()
{
// Need to get the correct tax rate based upon what State.
// Get the state the user is shipping to.
/* nStateIDX = document.formSalesOrder.elements[“BillingState”].selectedIndex;
strState = document.formSalesOrder.elements[“BillingState”].options[nStateIDX].value;
nTaxRate = 0.00;
if ( strState == “MI – Michigan” )
{
// If the selected state is ‘MI – Michigan’ then return the correct tax
nTaxRate = 6.000000;
}
return nTaxRate/100;*/
}
function getShippingRate()
{
// Shipping is a fixed percentage rate
var nRate = 0.000000/100;
return nRate;
}

function updateTotal()
{
var dSubtotal = 0.00;
var dShipping = 0.00;
var dTax = 0.00;
var dTotal = 0.00;

dTaxRate = getTaxRate();

var itemQuantity = [“QTY_1_TxTrayLW_DS”,”QTY_2_TxTrayThumb_DS”,”QTY_3_TxTrayHW_DS”,”QTY_4_TxTrayKT_DS”,”QTY_5_TxTrayLW”,”QTY_6_TxTrayThumb” , “QTY_7_TxTrayHW” , “QTY_8_TxTrayKT” , “QTY_9_DS_Retrofit” , “QTY_10_DS”];
var itemTotal = [“TOTAL_1_TxTrayLW_DS”,”TOTAL_2_TxTrayThumb_DS”,”TOTAL_3_TxTrayHW_DS”,”TOTAL_4_TxTrayKT_DS”,”TOTAL_5_TxTrayLW”, “TOTAL_6_TxTrayThumb” , “TOTAL_7_TxTrayHW” , “TOTAL_8_TxTrayKT” , “TOTAL_9_DS_Retrofit” , “TOTAL_10_DS”];
var itemPrice = [“PRICE_1_TxTrayLW_DS”,”PRICE_2_TxTrayThumb_DS”,”PRICE_3_TxTrayHW_DS”,”PRICE_4_TxTrayKT_DS”,”PRICE_5_TxTrayLW”, “PRICE_6_TxTrayThumb” , “PRICE_7_TxTrayHW” , “PRICE_8_TxTrayKT” , “PRICE_9_DS_Retrofit” , “PRICE_10_DS”];

for(var iCnt=0;iCnt<itemQuantity.length;iCnt++){

// Get the quantity for item ‘Product 3’
nSelIDX = 0;

nSelIDX = document.formSalesOrder.elements[itemQuantity[iCnt]].selectedIndex;
nQty = Number(document.formSalesOrder.elements[itemQuantity[iCnt]].options[nSelIDX].value);
// Update the line total for this item.
// Product subtotal = Quantity * Price
dProdSub = 0.00;
dProdSub = nQty * document.formSalesOrder.elements[itemPrice[iCnt]].value;
document.formSalesOrder.elements[itemTotal[iCnt]].value = formatCurrency(dProdSub);

// Form subtotal
dSubtotal += dProdSub;
}

// Update the TOTAL for the form.
if ( nQty != 0 )
{
dTax += dProdSub * dTaxRate;
dShipping = (getShippingRate()*dSubtotal);
}

dTotal = dSubtotal + dTax + dShipping;
document.formSalesOrder.elements[“editSubtotal”].value=formatCurrency(dSubtotal);
// document.formSalesOrder.elements[“editSH”].value=formatCurrency(dShipping);
document.formSalesOrder.elements[“editTax”].value=formatCurrency(dTax);
document.formSalesOrder.elements[“editTotal”].value=formatCurrency(dTotal);
}

// @@@@@ SALES ORDER SCRIPTS End @@@@@

[/CODE]

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