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Dynamic page content based on query string parameter

Hi, is it possible to make the content of the page dynamic without using javascript. ie, I want to dynamically choose content from a collection based on a URL query parameter.

So if the page has:

Then I would love to be able to select an item from a collection associated with “foo” and make that render in the page. Ideally there would be no Javascript involved, so I guess there would need to be some sort of server side scripting.