DOM9 Large Node

Element_node	1	ELEMENT node	Common
Attribute_node	2	Attribute node	Common
Text_node	3	Text node	Common
Cdata_section_node	4	CDATA section
Entity_reference_node	5	Entity reference
Entity_node	6	Entity
Processing_instruction_node	7	Processing instructions
Comment_node	8	Comment Node	Common
Document_node	9	Document node	Common

Get the first child element

function　　Getfirstchild (e) {  var e = e.firstchild;　　 while (e && e.nodetype! =1 = e.nextsilbing;  return  e;}

Get the first sibling element

function　　Getfirstchild (e) {  var e = e.nextsilbing;　　 while (e && e.nodetype! =1 = e.nextsilbing;  return  e;}

DOM9 Large Node