This tutorial covers classes and ids

Describes how to define CSS Class and ID Selectors and when is the proper time to use a class selector and an ID selector.

Learn how to create pre-loaded mouseover buttons

Most web sites, when you hover over the link, the image loads, often creating a funny look however temporary. There is a way to have those images load with the page but I can't remember how That 'funny' look is the delay between the onHover event and the image being loaded

Learn how to change image opacity or border on mouse over

Learn how to turn a list into a menu with hovers.

There are many ways to accomplish an image hover, this just seems to be the easiest way to do it! Although it does have it's limitations, and the image being used has to be a relatively simple one.