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Normally in CSS whichever rule is specified last takes precedence. However if you use !important after a command then this CSS command will take precedence regardless of what appears after it. This is true for all browsers except IE. An example of this would be:

margin-top: 3.5em !important; margin-top: 2em

So, the top margin will be set to 3.5em for all browsers except IE, which will have a top margin of 2em. This can sometimes come in useful, especially when using relative margins (such as in this example) as these can display slightly differently between IE and other browsers.

Usually attributes are assigned just one class, but this doesn’t mean that that’s all you’re allowed. In reality, you can assign as many classes as you like! For example:

<p class="text side"> Some Text </p>


Using these two classes together (separated by a space, not with a comma) means that the paragraph calls up the rules assigned to both text and side. If any rules overlap between the two classes then the class which is below the other in the CSS document will take precedence.