DX0 is true, cross-browser DHTML delivered by PHP. The acronym DX0 originates from this concept: [D]ynamic HTML [X]ross-Browser with Zer[0] Unused Code. DX0 is not just an DHTML library for PHP, but it sniffs the browser on the server-side and delivers specific code for the user's browser and version. Thus, Netscape users won't have to download code with Internet Explorer functionality that won't ever be used. And vice versa. v1.1 update: DX0 now allows reusable cross-browser widgets to be stored in a binary pickle, so scripters in any of the supported languages can use them. IE4+, NS4+, and Mozilla M14+ have all been tested and work well.