Selectors (2)

Descendant selector

A descendant selector selects an element only when it is the descendant of another specified element.

strong { font-weight : bold }
h2 strong { color : red }

a img {border: none}

Link pseudo class selectors

The selector which occurs further from the top of the style sheet prevails.

To learn more about selectors : http://westciv.com/style_master/academy/css_tutorial/selectors/index.html