Trying to get 2 Javascripts working together

[software4]

So I am not great at Javascript, but i have 2 scripts that i want to work with each other. When i use one by itself, they each work fine, but when i add them together it does not work.

I have a user form with a bunch of fields on it. If they choose an option on the drop down menu, some fields either show or disappear. Those fields have an "On Change" event that subtracts one field form another and gives us a total.
////////////////////////////////////// Drop Down Menu /////

rel sets to show the <tr>
<select name="checkout_by" class="textLeft" id="checkout_by" value="<?php if($cont == 'no') { echo $checkout_by; } ?>" > <option value="serial" selected rel="show">Item Series / Serial Number</option>
<option value="isbn" rel="none">Barcode / ISBN Number</option>

//////////////////////////////////// Fields used to subtract

<input name="serial_start" onChange="updatesum()" type="text" class="textLeft" id="serial_start" value="<?php if($cont == 'no') { echo $serial_start; } ?>" size="15">

<input name="serial_end" onChange="updatesum()" type="text" class="textLeft" id="serial_end" value="<?php if($cont == 'no') { echo $serial_end; } ?>" size="15">

//////////////////////////////////// Field used to add the total up from above

<input name="org_quantity" type="text" id="org_quantity" value="<?php if($cont == 'no') { echo $orig_quantity; } ?>" size="10">

///////////////////////////////////////Update total

script
<script type="text/javascript">
function updatesum() {
document.form1.org_quantity.value = (document.form1.serial_end.value -0) - (document.form1.serial_start.value -0);
}
</script>

//////////////////////////////////// Hide Filed Script

var containerTag = 'TR';

var compatible = (
document.getElementById && document.getElementsByTagName && document.createElement
&&
!(navigator.userAgent.indexOf('MSIE 5') != -1 && navigator.userAgent.indexOf('Mac') != -1)
);

if (compatible)
{
document.write('<style>.accessibility{display: none}</style>');
var waitingRoom = document.createElement('div');
}

var hiddenFormFieldsPointers = new Object();

function prepareForm()
{
if (!compatible) return;
var marker = document.createElement(containerTag);
marker.style.display = 'none';

var x = document.getElementsByTagName('select');
for (var i=0;i<x.length;i++)
addEvent(x[i],'change',showHideFields)

var x = document.getElementsByTagName(containerTag);
var hiddenFields = new Array;
for (var i=0;i<x.length;i++)
{
if (x[i].getAttribute('rel'))
{
var y = getAllFormFields(x[i]);
x[i].nestedRels = new Array();
for (var j=0;j<y.length;j++)
{
var rel = y[j].getAttribute('rel');
if (!rel || rel == 'none') continue;
x[i].nestedRels.push(rel);
}
if (!x[i].nestedRels.length) x[i].nestedRels = null;
hiddenFields.push(x[i]);
}
}

while (hiddenFields.length)
{
var rel = hiddenFields[0].getAttribute('rel');
if (!hiddenFormFieldsPointers[rel])
hiddenFormFieldsPointers[rel] = new Array();
var relIndex = hiddenFormFieldsPointers[rel].length;
hiddenFormFieldsPointers[rel][relIndex] = hiddenFields[0];
var newMarker = marker.cloneNode(true);
newMarker.id = rel + relIndex;
hiddenFields[0].parentNode.replaceChild(newMarker,hiddenFields[0]);
waitingRoom.appendChild(hiddenFields.shift());
}

setDefaults();
addEvent(document,'click',showHideFields);
}

function setDefaults()
{
var y = document.getElementsByTagName('input');
for (var i=0;i<y.length;i++)
{
if (y[i].checked && y[i].getAttribute('rel'))
intoMainForm(y[i].getAttribute('rel'))
}

var z = document.getElementsByTagName('select');
for (var i=0;i<z.length;i++)
{
if (z[i].options[z[i].selectedIndex].getAttribute('rel'))
intoMainForm(z[i].options[z[i].selectedIndex].getAttribute('rel'))
}

}

function showHideFields(e)
{
if (!e) var e = window.event;
var tg = e.target || e.srcElement;

if (tg.nodeName == 'LABEL')
{
var relatedFieldName = tg.getAttribute('for') || tg.getAttribute('htmlFor');
tg = document.getElementById(relatedFieldName);
}

if (
!(tg.nodeName == 'SELECT' && e.type == 'change')
&&
!(tg.nodeName == 'INPUT' && tg.getAttribute('rel'))
) return;

var fieldsToBeInserted = tg.getAttribute('rel');

if (tg.type == 'checkbox')
{
if (tg.checked)
intoMainForm(fieldsToBeInserted);
else
intoWaitingRoom(fieldsToBeInserted);
}
else if (tg.type == 'radio')
{
removeOthers(tg.form[tg.name],fieldsToBeInserted)
intoMainForm(fieldsToBeInserted);
}
else if (tg.type == 'select-one')
{
fieldsToBeInserted = tg.options[tg.selectedIndex].getAttribute('rel');
removeOthers(tg.options,fieldsToBeInserted);
intoMainForm(fieldsToBeInserted);
}
}

function removeOthers(others,fieldsToBeInserted)
{
for (var i=0;i<others.length;i++)
{
var show = others[i].getAttribute('rel');
if (show == fieldsToBeInserted) continue;
intoWaitingRoom(show);
}
}

function intoWaitingRoom(relation)
{
if (relation == 'none') return;
var Elements = hiddenFormFieldsPointers[relation];
for (var i=0;i<Elements.length;i++)
{
waitingRoom.appendChild(Elements[i]);
if (Elements[i].nestedRels)
for (var j=0;j<Elements[i].nestedRels.length;j++)
intoWaitingRoom(Elements[i].nestedRels[j]);
}
}

function intoMainForm(relation)
{
if (relation == 'none') return;
var Elements = hiddenFormFieldsPointers[relation];
for (var i=0;i<Elements.length;i++)
{
var insertPoint = document.getElementById(relation+i);
insertPoint.parentNode.insertBefore(Elements[i],insertPoint);
if (Elements[i].nestedRels)
{
var fields = getAllFormFields(Elements[i]);
for (var j=0;j<fields.length;j++)
{
if (!fields[j].getAttribute('rel')) continue;
if (fields[j].checked || fields[j].selected)
intoMainForm(fields[j].getAttribute('rel'));
}
}
}
}

function getAllFormFields(node)
{
var allFormFields = new Array;
var x = node.getElementsByTagName('input');
for (var i=0;i<x.length;i++)
allFormFields.push(x[i]);
var y = node.getElementsByTagName('option');
for (var i=0;i<y.length;i++)
allFormFields.push(y[i]);
return allFormFields;
}

/** ULTRA-SIMPLE EVENT ADDING **/

function addEvent(obj,type,fn)
{
if (obj.addEventListener)
obj.addEventListener(type,fn,false);
else if (obj.attachEvent)
obj.attachEvent("on"+type,fn);
}

addEvent(window,"load",prepareForm);


/** PUSH AND SHIFT FOR IE5 **/

function Array_push() {
var A_p = 0
for (A_p = 0; A_p < arguments.length; A_p++) {
this[this.length] = arguments[A_p]
}
return this.length
}

if (typeof Array.prototype.push == "undefined") {
Array.prototype.push = Array_push
}

function Array_shift() {
var A_s = 0
var response = this[0]
for (A_s = 0; A_s < this.length-1; A_s++) {
this[A_s] = this[A_s + 1]
}
this.length--
return response
}

if (typeof Array.prototype.shift == "undefined") {
Array.prototype.shift = Array_shift
}

[dlite922]

Use firefox. Open Tools-> Error Console.

Do you see any errors for your site?

(Hit the red circle (delete) and access your page again if there are too many errors)

What is the first error you see?

Dan