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- This menu technique is ideal if you have a number of pages on your site, and may need to frequently change the menu items on all or many of them. Using an iframe within a floating layer, the menu items are contained in a single external html page. Insert the layer code once into each page; so when you must change the menu, you change *only* a single external HTML page... with the changes instantly reflected in every page on your site. No server-side scripting; requires only knowledge of basic html editing.