For those of you who are using Firefox as browser, there is a very useful extension available that allows you to edit the stylesheet information of the pages you are viewing. It's called editCSS. The CSS of the page appears in a sidebar panel, and allows you not only to view the code, but also to make changes to it. The changes affect the page immediately, so you can see the result directly. Here is the link:
http://editcss.mozdev.org/installation.html
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