Displaying "image loading - animated graphic" during file download

[colintho]

Some web pages that have "large image" files display an "animated graphic" to show the site visitor that the file is being downloaded - how is this done?

[limbo]

Try using CSS and the background property for the IMG tag - where the background image is a small animated gif - if you use a little inline css in your page you can ensure the anigif loads first too.