Warning: E4X is deprecated. It will be disabled by default for content in Firefox 16, disabled by default for chrome in Firefox 17, and removed in Firefox 18. Use DOMParser/DOMSerializer or a non-native JXON algorithm instead.
This tutorial walks you through the basic syntax of E4X (ECMAScript for XML). With E4X, programmers can manipulate an XML document with a syntax more familiar to JavaScript programming.