A Simple Centered Fixed Width Layout

Using !important to Separate Styles From IE

Not really a hack, but rather a workaround for layout problems with IE.
Conditional

Make IE bend to your every will and command.

Allows you to hide all elements on an HTML page by their tag name. Extremely handy in getting around the "Windowless Elements" problem in IE, which is a bug that puts certain elements, most commonly select boxes, on top of any other element, no matter what. As you can imagine, this causes real problems with DHTML drop-down menus and such like. This is the simplest and quickest fix I've come up with, I simply set this function to run alongside the drop-down and all of the select tags vanish before a menu drops, then I run the show function when the menu retracts.

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.

An easy way to hide and show div's using Javascript and CSS.

Basically just a slight variation on this script by Real Gagnon.

Advanced CSS Hovering

Clearing Floats

a simple css way to add shadow to tables and Divs