Huot's File Extension and upload.gif

I noticed that the File extension stopped showing the upload.gif (progress bar) earlier this year – and just now got around to tracking down the issue.

It was broken after a build of EE fixed an issue where the previewed content was passed with the form. The fix is basically a JavaScript function added to the form using the onsubmit event. Unfortunately the event call is added via JavaScript in the head of the publish page, so the onsubmit event added to the actual HTML by Mark’s extension doesn’t work.

Here’s the official issue: http://www.w3.org/2001/12/DOM-Level-2-issues#i6

I don’t know JavaScript, so I’m unsure how to fix this. I’ve already tried adding the function call to the submit button (by hacking around in the extension and using onclick instead of onsubmit), but it doesn’t work – and sends the user to a blank page.

The upload.gif progress bar is an important visual feedback for larger files, so I’d like to get it working again.

Can anyone help?