# Blog

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I thought it would be fun to try my hand at producing a similar effect as the Visual Studio 2012 installer working/busy animation using pure-CSS. I think it turned out pretty well, it works in Opera, Safari, Chrome and Firefox.

Here is a method for selecting a column in a table using the selector :nth-child(n). You could then do whatever you want to it, like hiding or highlighting it. An example use could be showing that a particular column has been sorted, instead of the more traditional method of showing some indicator on the header.

I had a problem a while back where an IIS 6 server was not serving .docx extension files even though they were definitely there on the server. I immediately thought that the .docx MIME type must not be included in IIS 6 by default and it turns out that was the cause of the problem.

The difference between pseudo-classes and pseudo-elements can be a little confusing until you have it spelt out for you. Basically a pseudo-class is a selector that assists in the selection of something that cannot be expressed by a simple selector, for example :hover. A pseudo-element however allows us to create items that do not normally exist in the document tree, for example ::after`.