Each page in the site has the same header bar across the top as well as a menu bar on the left. Each page has the same layout with the information that you want to look at in the center or to the right side of the page. This gives the page the same look as a framed type of page without the same problems associated with frames. In another words the back button works like the back button would be expected to work.
The menu bar on the side is different on the pages that you link to from the original page. The original pop out menu is item is there, and it is a pop out menu style. There is also other items in the list that are related that are also a pop out style of menu. For example from the home page find the pop out menu on the left that says Diseases & Conditions. Put the mouse over this item and a menu pops out. Now click on Arrhythmia. The page that is displayed has the same top menu and the side menu is different. The side menu is similar in style and the way it works. The information displayed is just more concentrated on the specific information.
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