Javascript popup selector + PHP - php

Question

I have, with the help of the SO community written a javascript and php page that allows me to pass a value from the popup page back to the parent page.
This works 100% on internet explorer but not in google chrome or on my ipad / galaxt tablet.
Any idea on how this can be corrected? Any help appreciated as always.
Below is portions of my code from the parent page(newsale.php) and the popup page(sku.php). I know that other methods are recommended over using popup but I need to get this solution working with the popup page for application reasons.
newsale.php Parent Page (Code snippets, not entire page)
<script type="text/javascript">
function selectValue(id)
{
// open popup window and pass field id
window.open('sku.php?id=' + encodeURIComponent(id),'popuppage',
'width=1000,toolbar=1,resizable=1,scrollbars=yes,height=200,top=100,left=100');
}
function updateValue(id, value)
{
// this gets called from the popup window and updates the field with a new value
document.getElementById(id).value = value;
}
</script>
<table>
<tr id="r1">
<input size=10 type=number id=sku1 name=sku1 onchange="showUser(1, this.value)" <? if($rows>0){echo "value=".mysql_result($resultorder,0,1);} ?>><img src=q.png name="choice" onClick="selectValue('sku1')" value="?">
</td>
</tr>
<tr id="r2">
<td>
<input size=10 type=number id=sku2 name=sku2 onchange="showUser(2, this.value)" <? if($rows>1){echo "value=".mysql_result($resultorder,1,1);} ?> ><img src=q.png name="choice" onClick="selectValue('sku2')" value="?">
</td>
</tr>
</table>
sku.php Popup Page (entire page)
<?
$con = mysql_connect('localhost', 'username', 'password');
if (!$con)
{
die('Could not connect to server: ' . mysql_error());
}
$db=mysql_select_db("DBName", $con);
if (!$db)
{
die('Could not connect to DB: ' . mysql_error());
}
$sql="select packcode,category,description,grouping,packconfig,sellingunits,eottpoints from skudata order by category, packcode";
$result=mysql_query($sql);
?>
<script type="text/javascript">
function AjaxFunction(cat_id) {
var httpxml;
try {
// Firefox, Opera 8.0+, Safari
httpxml = new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
httpxml = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpxml = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support AJAX!");
return false;
}
}
}
function stateck() {
if (httpxml.readyState == 4) {
var myarray = eval(httpxml.responseText);
// Before adding new we must remove previously loaded elements
for (j = document.testform.subcat.options.length - 1; j >= 0; j--) {
document.testform.subcat.remove(j);
}
for (i = 0; i < myarray.length; i++) {
var optn = document.createElement("OPTION");
optn.text = myarray[i];
optn.value = myarray[i];
document.testform.subcat.options.add(optn);
}
}
}
var url="dd.php";
url = url+"?cat_id="+cat_id;
url = url+"&sid="+Math.random();
httpxml.onreadystatechange = stateck;
httpxml.open("GET",url,true);
httpxml.send(null);
}
</script>
<script type="text/javascript">
function sendValue(value)
{
var e = document.getElementById("subcat");
value = e.options[e.selectedIndex].value;
var parentId = <?php echo json_encode($_GET['id']); ?>;
window.opener.updateValue(parentId, value);
window.close();
}
</script>
<script type="text/javascript">
function updateinput(){
var e = document.getElementById("subcat");
var catSelected = e.options[e.selectedIndex].value;
document.getElementById("copycat").value=catSelected;
}
</script>
<form name="testform">
Category: <select name=cat id=cat onchange="AjaxFunction(this.value);" style="width=300"> <br>
<option value='' style="width=300">Select One</option>
<br>
<?
require "config.php";// connection to database
$q=mysql_query("select * from categories");
while($n=mysql_fetch_array($q)){
echo "<option value=$n[cat_id]>$n[category]</option>";
}
?>
</select>
<br><br>
Pack Code:
<select name=subcat onchange="updateinput();" >
<br><br>
</select>
<br><br>
<input type=hidden name=copycat id=copycat >
<td><input type=button value="Select" onClick="sendValue(document.getElementById(copycat))" /></td>
</form>
dd.php (for dynamic drop down list)
<?
$cat_id=$_GET['cat_id'];
require "config.php";
$q=mysql_query("select concat(packcode,', ',description) as details from skudata where cat_id='$cat_id'");
echo mysql_error();
$myarray=array();
$str="";
while($nt=mysql_fetch_array($q)){
$str=$str . "\"$nt[details]\"".",";
}
$str=substr($str,0,(strLen($str)-1)); // Removing the last char , from the string
echo "new Array($str)";
?>
I dont think dd.php has any influence on the functionality of the parent popup relationship but have included it so you can follow the code.
As mentioned this works 100% on Internet explorer but not in google chrome or my ipad.

Answer 1

When you use
document.getElementById("subcat");
then you should also have an element with such an id. Your
<select name=subcat onchange="updateinput();" >
won't do with browsers like chrome, firefox, konqueror and probably lots of others. Use
<select id="subcat" onchange="updateinput();" >
instead.

Answer 2

Unfortunately, I can't get your code to work so I can't test this, but changing
window.opener.updateValue(parentId, value);
to
window.opener.contentWindow.updateValue(parentId, value);
or
window.opener.window.updateValue(parentId, value);
may solve this.
If it doesn't, maybe you can post the errors that are showing from the Chrome console and explain better what exactly doesn't work.

Answer 3

In below function also,you called for subcat.
function sendValue(value)
{
var e = document.getElementById("subcat");
}
along with one mentioned by Themroc.
You should first have an id="subcat".
Still you getting some problem , post the error.
Thanks.