One can quickly make functional tests with the Firefox plugin Selenium IDE. If your web app runs on IE, just export the sequence of tests into either an HTML file or a Java file.
Here is a screenshot of some testing i did at work. The tests run directly inside the browser !
The coolest gift for geeks, the A0 poster of the 2008 Web Trend Map (841mm x 1189mm / 33.25in x 46.75in), is now up for grabs:
A good free book about Object-oriented Programming in Java !
Get it here :