File uploads are great because they are so compatible. Because they use standard HTTP virtually every web browser can do them and firewalls don't get in the way. If your user is on a fast connection or is uploading small files the process is instantaneous. You choose a file - you hit submit - your file arrives on the server.
Problems only start to arise when you want to upload large files or your users are on slow connections. When they submit their file it may take seconds or minutes to send to the server. Because browsers don't display progress bars your users may get confused or frustrated and give up rather than completing their upload. The obvious solution to this would be to give the user a dedicated progress bar but using Java or ActiveX brings in all the problems of incompatibility that we were trying to avoid in the first place.
ABCUpload utilizes a Pure HTML Progress Bar. It keeps track of every upload and allows you to watch how much of your file has been uploaded with absolutely no components installed on the client. If you can upload; you can use our progress bar - it's Pure HTML.