Simulating Position:fixed In IE 6 Through Javascript Only.

I've written a small javascript library to help automate Ajax requests
and the like. One of the things I want the library to do is display a
"Please wait" indicator in the upper right hand corner of the viewport
while requests are processing.

What I do is append a div element to the document body, set it's
position to fixed and set the top and right to 0. This works great in
Firefox and Opera, but not in IE.

var processing = document.createElement('div');
processing.appendChild(document.createTextNode('Pr ocessing...');
processing.style.position = 'fixed'
processing.style.top = 0;
processing.style.right = 0;
document.body.appendChild(processing);

In IE this element displays in it's normal position (at the bottom of
the page) as though it has a position: relative or position: static.

I've seen tricks using css and things like height: 100% and overflow-
yL auto, but these never seem to work when I try them
programmatically. And because I may want to distribute this, I don't
want to require that the end user go through any gyrations for ths to
work.