How to force the browser to reload cached CSS/JS files?

Question

I have noticed that some browsers (in particular, Firefox and Opera) are very zealous in using cached copies of .css and .js files, even be

Answer 1

You can force a "session-wide caching" if you add the session-id as a spureous parameter of the js/css file:

If you want a version-wide caching you could add some code to print the file date or similar. If you're using Java you can use a custom-tag to generate the link in an elegant way.