ElementTraversal for DOM Navigation: Working Draft
2007-07-27: The Web API Working Group released the First Public Working Draft of ElementTraversal Specification. The ElementTraversal interface defines four properties that scripts can use to navigate DOM Elements and also provides the property childElementCount for preprocessing. The specification was originally part of SVG Tiny 1.2. Read about rich Web clients. (Permalink)
Read more at: http://www.w3.org/News/2007#item166.