HTML and CSS

How to include an external CSS stylesheet:

<link href="site.css" rel="stylesheet" type="text/css" />

How to make a link open up in a new browser window/tab:

<a href="www.google.com" target="_blank">Click here!</a>

How to build a menu from css:

http://www.ssi-developer.net/css/menu-rollover-effect_table.shtml

CSS reference

http://www.w3schools.com/css/css_reference.asp