Finding Upload File Size - Javascript

Sep 8, 2006

I have used ASP.net 1.1. In that application user can upload the file(any printable document like doc/xls/ppt/pps/jpg/gif etc.,). The user allows to upload a max of 4MB.

But if the user uploads more than 4MB I'll issue a msg. But in slow network, the user needs to wait for much time to upload and even get error msg.

I want to stop from client side itself. Once the user selects the file to upload it shud b checked frm Javascript.

* Is there any way to do achieve this?
* The user should not change security settings in browser, if u suggests some method.
* If it is not possible/meaningful then please tell me the reasons very clearly. So I can stop searching.
* Please note any printable document can be uploaded.

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my script is based on ajax-uploader, which can be found at
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so here is what i do:

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function upload() {
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} else {
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filename = filename.substring(filename.lastIndexOf("")
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} else if (filename.lastIndexOf("/")>0) {
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makeRequest("upload_progress.php?sid="+sid
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form.submit();
}
}
}

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think it have something to do with redirecting the output of the
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(filename).
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