You can use the content type 'application/force-download' to tell the browser to download and save instead of displaying it inline. It is probably easier to get your web server to alter the content-type on static files then it is to write a script to do it. With Apache you could do it in a .htaccess file with ForceType or AddType.

But as is mentioned above, it is really up to the browser to decide what it wants to do with the data.

- Cees