Any idea how this is done?

Hi, I was just looking at the demo of Comus Thumbs at http://nibbi.net/scripts/comus_thumbs.php and I see he has an option there to lighted/darken/sharpen/resize/thumb images dynamically on the page (the image gets lightened etc without reloading the page....) any idea how? its listed that he is using imagemagik. He also has an option to thumb an image, where you click on the image and a rectangle appears, then when you accept it, it cuts the image exactly according to the rectangle....I am not too familier with imagemagik..is this easy to do? Thanks, Mag ===== ------ - The faulty interface lies between the chair and the keyboard. - Creativity is great, but plagiarism is faster! - Smile, everyone loves a moron. :-) __________________________________ Do you Yahoo!? Yahoo! Mail is new and improved - Check it out! http://promotions.yahoo.com/new_mail