Copy And Paste Form In Another Frame

I am trying to copy a form that is in one frame, using a button on another
frame. The form has a couple of tables inside it. I can get it working
when the button is in the same frame, but not in different ones. I get an
"invalid argument" error on the controlRange.addElement(x) line.

What I have so far is:

<script language='javascript'>
function CopyForm() {
if (document.body.createControlRange) {
var x = window.parent.fraRight.document.getElementById('Fo rm1');
x.contentEditable = 'true'
var controlRange;
controlRange = document.body.createControlRange();
controlRange.addElement(x);
controlRange.execCommand("Copy");
x.contentEditable = 'false'
alert('The table is now copied to memory.
Start Excel, and Paste
the table into a new worksheet.');
}
</Script>

where fraRight is the name of the frame the form is in, and Form1 is the
name of the form I want to copy. The only thing I have changed from when it
was working in the one frame, is:

var x = window.parent.fraRight.document.getElementById('Fo rm1');
used to be
var x = document.getElementById('Form1');

I can do things like alert(x.name) and get the right name of the form, so I
think I have got the object properly. Is there any other way to make sure?