Add line to break slider and page content

I would like to add a thick yellow line below the slider image on all pages, is this possible? [URL=http://s579.photobucket.com/user/tnotty/media/ScreenShot2013-09-13at125822.jpg.html][IMG]http://i579.photobucket.com/albums/ss239/tnotty/ScreenShot2013-09-13at125822.jpg[/IMG][/URL]