check out if it works with all browsers, here's an example (in german, though):
http://www.teamone.de/selfhtml/tchb.htm#a4
go to
Eingabefelder auf "nur lesen" setzen
click here:
Anzeigebeispiel: So sieht's aus
it's marked by the author as "4.0", that means: IE and NS 4.0.
but 5.x and 6.x versions are not covered yet by the reference.
better use normal displaying and a hidden input.