auto-refresh dynamic images

Hi, I am generating some jpegs dynamically from a weatherstation program and FTPing them to my webserver every 5 minutes. How do I get the PHP3 page to force the images to be uploaded to the client's browser every time the page is reviewed instead of getting the out of date images from cache? Also, how do I get the page to refresh at a particular interval AND refresh the jpegs? For instance if someone wants to leave thee page displayed ffor a while and just have it refresh every 5 minutes to show the new images and the coresponding change in weather? <METAs...> work only for the text, NOT the jpegs. Will using the header() function work for the images as well as text? Any help appreciated. Thanks, -- Erik Myllymaki erik@pacific-shores.com