well actually you can , firstly you have some element you can update like a text box and then use javascript to up this text box.
what you then do is flush the content to php file generates and spit out some javascript to change the text box data
I'm sorry, I should have said "You'll need javascript to do that." Oh wait, I did.
tedd
True, I just clarified it a bit , I hope, by adding the info about flushing the "javascript updater thing" from your php file.