If what you are refering to is the favicon, then there are several ways to accomplish what you are trying to do. Probably the easiest way to do it is to simply save an ".ico" file under the root folder of your website. For example "http://www.jboss.com/favicon.ico". On the other hand, to make sure you are compatible with as many browsers as possible, I would recommend you look at http://www.w3.org/ and follow their guidelines on how to add a favicon to your site.