If you are having problems with your code, please post a link to the page on a live server so that we can help you more efficiently. (.zips do not count, no one downloads these)
The problem is, if you were to just copy and paste your HTML/CSS/JavaScript into the thread you are creating, this does not help us troubleshoot your problem.
As this is a client-side-problem-related sub-forum, we need to be able to actually visit the page giving you problems so we can help you debug properly - Otherwise we are just guessing.
I use it to turn on and off images and css to see what my site looks like without them. But it also has a lot more then just that. Pretty neat little toy!
One day I woke up and that IE developer tool bar had auto downloaded and installed itself. I thought it was malware or some ■■■■ thing but it was so useful I never really did anything about it except use it. The one day it mysteriously disappeared and I started crying myself to sleep and developing serious alcoholic problems until I found this thread and a link to the tool bar which just so happens to be from MS!