I have a form inside an iFrame. When I press the button on this form, it executes a method on the server with onServerClick () and deletes the iFrame screen (Post). Add an Autopostback = true so that it does not erase the iFrame and execute the code inside the onServerClick (). Inside this code there is a moment that I make a call to a function in JavaScript but it does not work in the same way if I put the AutoPostBack to false if it calls it.