risal-download is a simple scripts to avoid download abuse(either by human or robot).
Use shortcode [risal id=x file=xxxx] at post or page (using visual or html editor) in order to use it.
id refers id's number in the download-able record, and file is whatever name you decide to use. It's not depend on filename in database's record.
Provided link (by shortcode) will using pop-up, therefore visitor must disable pop-up blocker for your website.
So far this scripts wrote for Internet Explorer, Firefox, Arora, Google Chrome and Opera. You may suggest others for me to rewrite the scripts and make a new realease/version.