title: How to toggle everything EXCEPT the <b> tags
body: <p>I would like to create a summary view for my blog, and I think it can be done with jQuery.
  My idea,  is to hide EVERY element on the page excluding only the h1, h2, img and b tags.
  Any idea about how I can do that selection?</p>
  
  <p>This is an easy example:</p>
  
  <p>Original state:</p>
  
  <pre>
  h1: Blog Title, it remains
  p: First sentence of the post
  p: Second sentence of the post
  img: /foo/bar.png, it remains
  b: This is a bold text, it remains
  </pre>
  
  <p>When jQuery button clicked:</p>
  
  <pre>
  h1: Blog Title, it remains
  img: /foo/bar.png, it remains
  b: This is a bold text, it remains
  </pre>
  
  <p>I've been working around withe the :not selector and .not method, but I dont seem to be able to achieve what Im looking for.</p>
  
  <p>As always, any help would be really appreciated.</p>