Explaining my problem: In my asp.net solution i have 2 buttons:Button 1 and Button 2 I have 2 Usercontrols with totally different contentonclick of each of those buttons i want to load different usercontrol into ContentPlaceHolder, but without reload whole page. So actually it have to work like Ajax TabContainer (but without loading all tabs at once). I have tried to solve this problem with Ajax tabcontainers, but loading times was just awfull.Anyone had same problem? how do u solve this one guys?