I often felt the lack of a good debugger for Internet Explorer during my web programming...
For Mozilla Firefox there's a wonderful FREE add-on called Firebug , and I really miss something like that for Internet Explorer.
I tried using MS Script Debugger and also MS Script Editor, but I don't like them.
Then I found a nice blog post that help me a lot during my web programming:
Reading the comments to that post I also found this nice screencast that visually explains how to accomplish the set up of the free Microsoft web debugger.
Is there any other good (free) debugger for IE? Let me know.