If you are using Netscape Browser, go to Edit/Preferences/Advanced and
change the Cache options to Everytime.
If you are using IE, go to Internet Options/General/Temp. Internet
files/Settings and set "every visit to the page".
I hope this will solve the problem in the client side.
When you are sending the page with the Image from the server, you can set
the "Cache-Control" header to "no-cache" so that the page is not cached and
the fresh page with the new image will be loaded.
I think the second approach is the best way to solve the problem.
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