Problem with combo in js IE - new Option(t,v) not working

Question

hello! Did somene had experience some problems with
adding new options in select object (combo box) in javascript? I can change text or value property, delete option by setting it to null, but when I want to add new, there is a problem!?
why this code doesn't work?
<script>
ref = window.document.frmExample["cbo1"];
alert(ref.length);
ref.options[ref.length] = new Option("text'","value1");
alert(ref.length);
</script>
interesting thing is that this works in Netscape (6), but it is not working in IE(5.5), and this is my first and last example where Netscape is 'better'...
Can someone help, please?
regards...
Vlada

Answer 1

you are right, it works in the 'mother' page, but if I want to add some options from popup window (window.open...), and when I accessing combo throught opener propery, than I have problem, because it is not working!?
code sample...
... 'mother' page function ...
function fAdd(){
var popupW;
popupW = window.open("page.html","name",attr);
if (!popupW.opener)
popupW.opener = window;
... popup window function...
function fClick(){
var opt;
var ref = window.opener.document.frmExample1["cbo1"];
alert(ref.length);
opt = "new";
ref.options[ref.length] = new Option(opt,opt);
window.close();
I get alert with the number ofoptions in combo, so ref is OK. I can delete some of them, change, but not to add new! Then I get Error message.
any sugestion!? Strange, but it works in Netscape ...