Right click, view source

Whenever I'm testing a web application, when I see a page of any sort of complexity I view the source code. You never know what you'll see lurking around in there. Sometimes you can be looking at what you think is static text to find it's generated. Sometimes you can find useful comments lurking around in there. Every time it gives you a better understanding of what's going on in the background.
Web TestingMichael Kelly