AJAX C# .NET .aspx page with real time progress

Using AJAX C# .NET VS 2008 JQuery I want a .aspx that will display the progress of a long web processing .. ? You can make it simple like the following for loop. for (int i=0; i < 1000; i++) { ? ? ? wait(1000); ? ? ? //Here the progress need to be displayed in a modal popup, containing like "Processing Item:abcde, record xxx of nnnn, Error: yy, Success: zzz" } In the modal, there should be a "Cancel" button, when cancel is clicked, then process should stop? displaying? "Cancelled By User" in the modal.