I would like to create a gridview like Yahoo Grid or Twitter grid,  for example for first time the grid will display only 20 rows and then when you click on more button it gives your the other 20 rows at the bottom of the grid so that the grid will contains 40 rows, and when you click on more button it gives you the other 20 row ... etc like twitter.

I know that I need to use JSON with Jquery, could you please give me sample , I am ASP.NET developer.

Thanks.