Grid View functions using Jquery Json

Question

Hello ,
     
         I am new to json and all, but in one project i lodde some customers to drop down with phone number search and and afetr slecting customer fro drop down bingding there transactions to grid view using json .All these are done by client side calling of web methods using jquery and json binding till here everting is fine . But in the grid view i have to select a row and have to display details in other gridview but i am not able to do that is there any solution .

         Is it that if I have to use all the power of grid view is it better to go through server side . Please advice  me.