This requires flash, but may work very well for you. (I am not related in
any way)

http://labb.dev.mammon.se/swfupload/

>From the site: 

    *  Only display chosen filetypes in dialog
    * Upload multiple files at once by ctrl/shift-selecting in dialog
    * Trigger javascript functions on start, cancel, progress and complete
    * Get file information/size before upload starts
    * Style upload buttons any way you want
    * Do progress-bars/information using valid XHTML and CSS
    * No page reloads, display uploaded files as they are finished
    * Works on all platforms/browsers that has Flash support.
    * Degrades gracefully to a normal html upload form if Flash or
javascript isn't available
    * New! Control filesize before upload starts
    * New! Won't give the "script is causing slow playback"-error anymore
    * New! The swf won't do anything with not-allowed filetypes


----- Original Message -----
From: "Gaulin, Mark" <[EMAIL PROTECTED]>
To: "CF-Talk" <[email protected]>
Sent: Tuesday, December 05, 2006 6:28 AM
Subject: Any way to limit file upload size?


> Hi
> Is there any way in CF or IIS to limit the allowed file size for a form
> with a file "attached"?
>
> I have a situation where someone might accidentally upload a huge file
> when all we want is a sample file.  I would want to avoid not only
> creating a huge temp file but also all of the bandwidth needed to send
> the file to the server.
>
> Thanks
> Mark
>
> 



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