It seems your browser doesn't meet the minimum requirements. So you can't use this demo site.
Try to update your browser if possible. I suggest Chrome or Firefox :)
Drag and Drop your files or click here to upload directly.More info..
Please note this is NOT a fully fledged file upload script, (it doesn't handle older browsers etc..). This (was) only demo I wrote years ago to demonstrate how to make a resumable file uploader.
Maybe better option would be http://html5uploader.filkor.org/ for you.
You can upload by drag and drop files from your folders, or click above to upload in the usual way. Multiple files are allowed.
You can pause the uploads (you can even close your browser, or turn off your computer.. you don't have to restart again from the beginning).
The maximum file sizes could be hundreds of MB-s.
This is just a demonstration, the files will be deleted after 1 hour.