Images keep reloading



When I access my php driven site, every time I click a link all of the images reload. This causes my site to load slower and gives it a kindof choppy look. Is this because of my browser settings or is there a way to tell php to use the cached images.
my site is at if you wanna take a look
when you say choppy do you mean part of the images are cut off? You can solve that by defining the witdth and height of the image in the <img> tag.