The PECL uploadprogress modules allows a user to see a upload progress bar.
This is a great UI that makes uploading intuative and hence good user experience.

To intall uploadprogress module, from the command line

# pecl install uploadprogress

If you get make command not found error, this means you need to install the 'make' utility first.

You can search for the 'make' utilility form Webmin > Software Packages - Yum Search or from the command line

# yum install make

Once make is intalled, you can run the command to install uploadprogress.

Now all you need to do is

1) configure php.ini and add

extension=uploadprogress.so

 2) restart apache for the changes to take effect.