IE Developer Toolbar

Microsoft has got something similar to Firebug (for Firefox) in its bag. Its a toolbar which you can install very fast.

It has some interesting tools to modify the DOM right in the browser, view the styles, Outline the DIV, Tables etc and a very useful Ruler tool.

You can download it here.
https://www.microsoft.com/downloads/details.aspx?familyid=E59C3964-672D-4511-BB3E-2D5E1DB91038&displaylang=en

Some good documents on Sharepoint Application Development

You can find some great resources on learning Sharepoint Technologies from the expert Ted Pattison from his own website.











http://www.tedpattison.net

Among others you will find some interesting screencasts and a great PDF which is actually a book partly written by him.

http://www.tedpattison.net/downloads/MOSS_BOOK.pdf