I wasn't sure what it is called, so I couldn't search for it, so I also apologize if its been asked before.
I've seen on on various web pages the action of selecting something from a drop down menu, and instantly, something on the site would change, like say you pick a category in a drop down menu, and isntantly another dropdown menu appears displaying sub categories.
Currently, I know how to get results on the same page, via a 'submit' button to post the current category and grab the data to display the sub category drop down menu on the next page.
My main goal is to get rid of the submit button so that the user can just keep rolling through the application without having to click submit everytime the enter in a piece of information.
Thanks for the help