[jQuery] setting value in iframe hidden var?

[Jack Killpatrick]

I've googled around and searched this list's history and found various 
discussions about how to set a value (in this case, in a hidden form 
field) inside of an iframe from the parent, but nothing so far seems to 
be making IE happy. I *don't* want to use the frameReady plugin and am 
looking for any advice someone might have, or a working example?

I basically have a td with an iframe in it. The src for the iframe is an 
html file. The html file loads, and at some point during use the user 
will click a button on the parent that has to set a hidden input field 
in the iframe. If it matters, jquery is loaded in the iframe.

Thoughts?

Another bonus would be a snippet of script that will resize the iframe's 
height to match the height of it's contents. IE: iframe loads it's src, 
then something modifies the iframe's height so that the user will never 
see scrollbars on the iframe (it's not very tall, but browser rendering 
differences make setting a decent looking height a bit challenging).

TIA,
Jack