Suppose I have an HTML file consisting of a table with a few cells plus the main design of the site. Now I don't want to keep the design on more than one file (easy to make changes).

I want to change the contents of a particular cell and refresh 2 other cells (containing ads) when a button on the navbar is clicked. Any ideas on how to get this done?

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I, Bin Laden, declare a day of mourning in the whole of the Middle East over the death of an atomic bomb buried in the seabed of the Pacific