Object doesn't support this property or method (line 104, char 1)

Line 104 is:
var checkBoxes = document.querySelectorAll("input[type=checkbox]"),

My life is hard, I suffer lots

var getCheckboxes = function () {
    var i, elements = document.getElementsByTagName("input"),
        max = elements.length,
        result = [];
 
    for (i = 0; i < max; i += 1) {
        if (elements[i].type === "checkbox") {
            result.push(elements[i]);
        }
    }
    return result;
};

var checkBoxes = getCheckboxes,

FORJ Forum

Here you go - it now complains that f5 isn't defined (which sort of makes sense as I used to use that to calculate my totals).
I could remove the totaliser line (line 135) but no idea what to put in it's place.

As for why I'm reading a value from a table, have a look at the file in IE and it should make more sense. This is about choosing a base product from a choice of 4, and then adding various options.
Radio boxes are used for the initial selection, and then checkboxes for the rest. The total then displays the price for your selection.

My life is hard, I suffer lots

var GrandTotal = f1 + total,
    GrandTotalW = w1 + totalWholesale;

var checkBoxes = getCheckboxes,

var checkBoxes = getCheckboxes(),

FORJ Forum

Still not working. I noticed one error myself, you'd referred to a variable as GrandTotalW rather than GrandWTotal, but then I got this next one:

Message: 'parentElement.previousElementSibling.innerHTML' is null or not an object
Line: 126
Char: 9
Code: 0

HTML is attached.

(by the way, this is why I prefer my method, it may be more long winded and cumbersome, but it's a damn site easier to understand and fix when it goes wrong)

My life is hard, I suffer lots

<script type="text/javascript">
//Get the values from the table when checkboxes are checked
var getCheckboxes = function () {
    var i, elements = document.getElementsByTagName("input"),
        max = elements.length,
        result = [];
 
    for (i = 0; i < max; i += 1) {
        if (elements[i].type === "checkbox") {
            result.push(elements[i]);
        }
    }
    return result;
    DeleteComma(result);
};

<script type="text/javascript">
function DeleteComma(num) {
var temp1 = 0;
var xarray = num.split(",");
if ( xarray[2] != null ) {
   temp1 = xarray[0]+xarray[1]
+xarray[2]; return temp1 } 
else if ( xarray[1] != null ) {
          temp1 = xarray[0]
+xarray[1]; return temp1}
       else
{temp1 = xarray[0]; return temp1 }         
}
</script>

My life is hard, I suffer lots

var deleteCommas = function (num) {
    return (num + "").replace(/,/g, "");
};

for (i = 0; i < max; i += 1) {
    if (checkBoxes[i].checked) {
        // Get values directly from table cells.
        total += +checkBoxes[i].parentElement.
            previousElementSibling.innerHTML;
        totalWholesale += +checkBoxes[i].parentElement.
            previousElementSibling.previousElementSibling.innerHTML;
    }
}

var element, deleteCommas;
 
deleteCommas = function (num) {
    return (num + "").replace(/,/g, "");
}; 
 
for (i = 0; i < max; i += 1) {
    if (checkBoxes[i].checked) {
        element = checkBoxes[i].parentElement.previousSibling;
        total += +deleteCommas(element.innerHTML);
 
        element = element.previousSibling;
        totalWholesale += +deleteCommas(element.innerHTML);
    }
}

stripNonNumeric = function (num) {
    return (num + "").replace(/[^0-9.]/g, "");
};

FORJ Forum