CSS3 drop down menus

http://www.htmlgoodies.com/html5/tutorials/create-drop-down-menus-with-css3.html#fbid=LCLjK-3H7T9 shows off making drop down menus without the need for JavaScript to hide and unhide things. Use logic like this:

.drop-menu:hover .sub-menu {

   display: inline-block;

}