I am new in AJAX. I have searched a lot on Internet but only got basic AJAX steps. Now I am writing codes using AJAX but a common problem I am facing continuously. 

When I place return text in the particular id of HTML page, Javascript effects do not work. CSS works fine but Javascript effects like table sorting, jQuery effects or any other effect does not work. I know I am missing some concept here. But didn't get any effective answer. 

Please suggest me what should I do? And what is the concept behind this...