On 10 Oct 2001, at 12:09, Jim H wrote:

> Hello:
> 
> I have been searching all over the web for a javascript routine that
> will only allow a visitor to download a file once. This can either ask
> the visitor to enter information (i.e., a password, username) but that
> information can only be used to download the file one time, then it
> becomes invalid. 
> 
> Is there such a thing.  If so, I can't find it and need your help!
> 
> Thanks to all who help on this list and to all those who often times
> are lurking in the shadows...like I do!
> 

for a server side approach, have a look at downloadprotector on 

http://www.phpscriptcenter.com

I have not evaluated this to any extent, but it might go some way to 
solving your problem

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