What can this do for me?
Here it was used to generate the popout for client area and contacts on the top right.
Here it is used to swap images to show a before and after shot.
Java can also be used to detect the size of the window that the browser has opened and then to position the page accordingly.
This was used on our front page to centre the table and so allow a large amount of text specifically for search engine optimization to be added without detracting form the simple clean design of the page.