Filter 2 different nodes in E4X?

Question

Can I filter 2 different node types in E4X same as attributes but then on node type? I cannot find this anywhere:

Something like":

$.book_xml.pages.page.(node == 'front' && node =='back');


<pages>
 <page>
  <front></front>
  <back></back>
 </page>
<pages>

Answer 1

Not familiar with e4x in javascript but this works in actionscript:

trace(book_xml.pages.page.*.(localName()=="front" || localName()=="back"));

Returns both the front and back nodes.