Grand total as an input field to forward to php

[taikomi]

I found this awesome piece of code and it works like a charm for what I want, but if I try to make the gTotal calculate as an input field as well it will not work at all...doesn't matter if I grab it by it's id either or anything...everything I try breaks the gTotal calculation...What I need is for the gTotal to be calculated into an input field so that my php page can grab it's name and post the gTotal.
here is the code:

function update(el)
{
var tr = el.parentNode;
while (tr.nodeName.toLowerCase() != 'tr'){
tr = tr.parentNode;
}
 
var qty = tr.cells[1].getElementsByTagName('input')[0].value;
var cost = tr.cells[2].getElementsByTagName('input')[0].value;
var total = Math.round(qty*cost*100);
 
tr.cells[3].getElementsByTagName('input')[0].value = cToD(total);
 
var rows = tr.parentNode.rows;
var i = rows.length;
var gTotal = 0;
while (i--){
gTotal += rows[i].cells[3].getElementsByTagName('input')[0].value * 100;
}
document.getElementById('grandTotal').innerHTML = cToD(gTotal);
}

[Dormilich]

you have to modify the cToD() function.

[taikomi]

Thank you for the response I tried that... I changed the function to a few old ones I had which:

function formatCurr(n) {
    return n.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,');
}
function dm(amount) 
{
string = "" + amount;
dec = string.length - string.indexOf('.');
if (string.indexOf('.') == -1)
{return string + '.00';}
if (dec == 1)
{return string + '00';}
if (dec == 2)
{return string + '0';}
if (dec > 3)
{return string.substring(0,string.length-dec+3);}
return string;
};

neither of them help me...
I changed the gTotal to:

tr.cells[4].getElementsByTagName('input')[0].value = dm(gTotal);
document.getElementById('gTotal').value  = dm(gTotal);

neither of them work either... Sorry I guess I just don't understand this type of coding...more of a UIX than a functional coder...although I have my form 99% working. :)

[taikomi]

I figured it out finally...so in case anyone else has this issue here is the fix and it is so simple it's embarassing. lol. :)

document.purchreq.gTotal.value = formatCurr(gTotal);