Thanks John

I actually went down the route you suggested using a little more javascript then you mentioned. Again I ran into the problem that the upload file wasn't actully written out on the server until the entire file had been upload

Obviously the process is storing the chunks of uploaded data in a temp file or cache until everything has been uploaded so my second Perl script has nothing to report on until the file is finally uploaded which, of course, is too late

Just about to give up on this approach and simply have my second Perl script just display a file uploading message and exit when the file has been uploaded

Unless you can access the data as its being uploaded then this approach won't work. Still, I learned a lot of stuff trying it out

Thanks

Eoin