I am setting up a way for our customer to be able to update the content on a couple of their webpages, but I am not finding a way to include the stylesheet that their website uses into the editor.  Meaning when they enter any tables or anything in the editor it looks totally different than it will look on the actual site as none of the styling is shown in the editor.  I am sure there is a way to tell it to use a certain stylesheet for the editor area, but I can not find this resource.  Any help?