JavaScript is the most popular language used to create a dynamic web site. With the addition of this language to a web site you can enhance your functionality in ever aspect imaginable. Herein contains some examples of how javascript can be used to create a more functional and detailed site.

A Dynamic Javascript Tree
This will load a pop up window, which will also contain some javascript examples in an iFrame so that you can access the source code without any other HTML in the way. For simplicity sake, the javascript will be embedded in the HTML.