I don't usually repeat what others are saying, but these web debugging tools posted by Jon Galloway are awesome. I've used ieHttpHeaders for quite a while, but the FullSource tool is new to me -- and its just incredible in what it does. By the way, all web developers should at least have a fair idea of what's going on under the covers with the http protocol. I used to send raw http commands using telnet, but ieHttpHeaders makes it trivial to see everything that is involved with a request. Similarly, if you've ever used javascript to dynamically create your tables then you know its a pain to debug, and FullSource is what you've been needing.