>sorry :) but i have discussion with the server programmer that's why i asked

Well, maybe he can add an md5 hash somewhere - if he cannot or will not you'll just have to download and recheck the filesize on the server after download. If they match, I guess you're OK

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>>>it would be good if i could manage the uploading software but I can't so...i have to work just on the client side :)
>>>
>>Then, your first message is a bit confusing