ie/firefox and flash: what's the refresh algorithm

I made a flash and embed it into a webpage. I use the browser to test the flash, an intersting thing, after I upload开发者_运维问答 the flash into the server, and press F5 to refresh the browser, the browser still use the old one, I can't enforce the browser to use the new flash swf file!

How can I tell browser to use the new swf?

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Try appending a random (and meaningless) query string to the URL of the SWF. That way, the browser thinks it's a new file and will download it again from the server.

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If you append random query string to your swf file in javascript, as Tim suggests, following things will happen:

• swf will be loaded every time from server (no caching at all)
• browser cache will be populated with copies of your swf (one after each request, if browser is not smart enough to compare file contents)

I think it's best to append version to your swf and update it (like name1.0.swf, name1.1.swf and so on).

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Another option is to delete the browser cache, if you don't want to rename your file everytime you make a modification.

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For Firefox you can use FireBug for disable the browser cache.