A new way to do layout; CSS Scripting Layout

Yuck.

Netscape and IE did something like this back in the day. Pretty sure there is a reason it failed.

Also, what's with the opening paragraph:

This document describes a new set of CSS properties and object specifications that together compose a powerful declarative means to describe complex arbitrary layout criteria that are both reusable and extensible. The new properties are Javascript expressions that are woven together in a constraint resolving system to perform a specified layout. Additionally, a set of global objects defined in the constraint resolution Javascript execution environment enable powerful operations to be expressed succinctly resulting in more readable and compact layout specifications.

I hope their code is more succinct than that ...

Ouch my eyes. The code looks terrible. It's a clever idea and all but entirely impractical (relying on the user to have in the best case Javascript enabled for layout and in the more likely case a specific plugin). I prefer the compiled CSS approach I'm seeing here and there - writing CSS in a higher level language and compiling to CSS.