Adding unobtrusive progress bar to old-school file uploads

Question

You all know the new generation of fancy, mostly Flash-based file uploaders like SWFUpload that can show a progress bar while uploading - a great improvement especially for

Answer 1

How funny, I just saw Simon Willison blog about Plupload, which is a JavaScript library that I think does file upload progress bars (amongst other things).

It uses Flash, Silverlight, or whatever’s available, but I think abstracts all that away from you, so you’re still uploading with a regular HTML form.