Possible to prevent images in a page from caching?

[Epsilon]

Is there some sort of HTML directive I can put in the page (maybe a META tag) that will prevent images on the page from being cached? I want to force browsers to reload the images every time the pages is viewed.

(It's for a script I have that allows people to upload photos. If they replace a photo with one of the same filename, they can't see the new photo until they refresh their browser. Causes confusion with dumb computer users.)

[sde]

i don't know if this works for sure, but i remembered someone posted it here a while back on an un-related topic.

<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">

[redhead]

I believe the same thing came up in another thread: http://codenewbie.com/forum/t1816.html