I could not figure out how to add an inside border inside the iframe other than putting the border directly around the content within the html code. This is not optimal for us because of screen size. It is beautiful on my screen, with scrolling, however on my partners much larger screen the iframe is much longer than the content, without scrolling, and the border stops at the end of the last paragraph of the content. See here:
Click on either of the first 5 links in the sidebar to see the popups. You will see the popup with the border around the content. Is there a way to do this exact same thing but put the border on the iframe so if it is longer than the content the border would appear the full length of the iframe as seen according to screen size.