How can i make the surfer's browser to cache my images
 

I got this page on my site that the surfers are viewing like 10 times in each visit, the size of the images in there are almost 100k, it seems that on my local IE, every time that i load this page it's downloading all of the images, how can i in the html or someting setup a command to the browser that it should cache that images, and try to download them again only if there has been a week since the last time it cached them ?

Thanks.

Its a browser setting. You can only switch catching of in html ( meta tag )