need a help with ASP.Net 2.0 Callback future

[memoboy]

i used ICallbackEventHandler interface to run the callback future with my code, and it work with a simple example like one button refresh one GridView, but what i realy need and trying to do is to have two button and two different controls like a gridView and comboBox Control and each one of it refreshed by one button :confused:

[russellsoft]

I think using ICallbackEventHandler is not better decision, because it works only in browsers which support XML-HTTP protocol... I know only one - internet Explorer... But in Mozila and some other browsers you page will not working using callback functions...