Need help adding Expires headers

So basically I've ran my site through ySlow and it has informed me that I should add Expires headers to some of the elements on my page to help with the caching. The page is mainly static content currently hosted on an Apache/2 server.

If it helps at all the site is here.

I'm not really sure how you alter the HTTP information or what the best way to add Expires headers is so I w开发者_Python百科ould greatly appreciate any help on this one.

You could use the mod_expires module of Apache2 to set the Expires header on your semi-static files. For reference: mod_expires documentation on apache.org