A simple, yet powerful (what a cliché) way of resgistering javascript keyboard shortcuts. Register any kind of keyboard shortcuts, and if applicable, override the browser default action.

Example usage and more info here:

Javascript Keyboard Shortcut Manager

Enhance External Links

Fade an Element

I use this in my AJAX as a quick way to get the Value of the selected item in a Select HTML object. If nothing is selected, it returns zero.
(May be basic to y'all, but maybe really usefull to someone else).

Here's a basic function for debugging any kind of PHP variable. It allows for "invisible" or "visible" output--that is output in HTML comments or within visible HTML tags. It also supports customizable "containers" which lets you easily edit the look of the visible and invisible blocks. Examples in code below.

Set Everything to Square One

A Simple Centered Fixed Width Layout

Using !important to Separate Styles From IE

One way to group elements in HTML is to assign them a name attribute. Multiple elements can share a name, then you can easily access them as an array using the getElementsByName() method.

The problem is that some DOM parsers aren't keen on, or are ignorant to, this use of the name attribute, so a simple object.name returns undefined. In my case, it was a DIV in Firefox 1.5 that was behaving this way.

There is a simple work around for this that works in Firefox, I haven't tested it in others. It is to use the getAttribute method that is an extension of any element object.

This ability can be useful if you have a function that performs a transformation on the active element, and another transformation on closely related elements.

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