I’ve been working on a website for a friend of mine and, as I have tried to clean up the last couple of things so
I can invoice so it can go live, I haven’t had a lot of luck.
Then I found Opera Developer Tools. They come with Opera. I just never stumbled over them before.
It shows the css, the rendered page code, and the scripts, as well as lists page errors and all sorts of other neat stuff.
Click the image for a larger picture.
Afterthought: I’m hardly a web developer. But I’m a pretty good editor.