title: How to Invalidate Web Browser Cache Content
body: <p>I've been really digging into Google Page Speed, optimizing a lot of the sites I'm working on to score well on that -- and quite successfully I'm proud to say.</p>
  
  <p>The only downside I've come across is that by some of the caching stuff being done, small changes to JS and CSS tend not to cause a new copy of the files to download.</p>
  
  <p>Is there any way when changes are made to the JS, CSS (or other resources) to force a new copy to download?</p>