title: What is the simplest way to filter the content of a web page from a drop down menu?
body: <p>I would like to be able to allow a user to "filter" the contents of an HTML page from a drop down menu.</p>
  
  <p>I have minimal coding skills but maintain a simple website produced using Emacs org-mode. (easy to assemble pages and produce different versions of the same content using tags.) The output is simple HTML. </p>
  
  <p>I can easily produce different versions of a page and make them selectable with a drop down menu to move between them, but this means I have different versions of the same content on my website, which makes retrieval from search engines confusing.</p>
  
  <p>Ideally, I would like user A to be able to select to see the whole page, user B to see some of it, and user C to see most of it except a small portion. This is a convenience to the users (not for security, etc.)</p>
  
  <p>What is the <strong>simplest</strong> way of implementing this? I realize a web developer would probably use Ajax, etc., but that's not me.</p>