[1.0/1.1] About Client Callbacks Without Postbacks / XMLHTTP

Hi, I had a question regarding TextChange Events earlier, and becuase I require the use of real-time updates, I have AutoPostBack on. However, it's creating a blink of the page (page reloading info from server). The simple solution was to create javascript, but that means I would have to recreate all the codes :eek: :'( so

So, I read about Client Callbacks, which says it doesn't go thru a round trip because it calls a certain values from server then keep it local on the client side?!? But I am just wondering if anyone have had experience with it and knows if that will solve the page-loading problem?

PS: or if anyone have used XMLHTTP knows that it doesn't loads the page?