sXPath = "/node()[2]";
oXML = loadXML("http://www.mozilla.org/projects/xslt/test.xsl");
result = oXML.evaluate(sXPath, oXML, null, 0, null);
node = result.iterateNext();
if (node)
     alert(node.nodeValue);


  const unsigned short      ANY_TYPE                       = 0;
  const unsigned short      NUMBER_TYPE                    = 1;
  const unsigned short      STRING_TYPE                    = 2;
  const unsigned short      BOOLEAN_TYPE                   = 3;
  const unsigned short      UNORDERED_NODE_ITERATOR_TYPE   = 4;
  const unsigned short      ORDERED_NODE_ITERATOR_TYPE     = 5;
  const unsigned short      UNORDERED_NODE_SNAPSHOT_TYPE   = 6;
  const unsigned short      ORDERED_NODE_SNAPSHOT_TYPE     = 7;
  const unsigned short      ANY_UNORDERED_NODE_TYPE        = 8;
  const unsigned short      FIRST_ORDERED_NODE_TYPE        = 9;



Node.prototype.selectNodes = function (sXPath) {
	var oNode, aNodes = [],
	 xPathResult = this.evaluate(sXPath, this, null, 0, null);
	do{
	  oNode = xPathResult.iterateNext();
	  if(oNode && oNode.nodeType != 3)
	    aNodes.push(oNode);
	  }
	  while(oNode);
	return aNodes;
	}

Node.prototype.selectSingleNode = function (sXPath) {
	var xPathResult = this.evaluate(sXPath, this, null, 0, null);
	return xPathResult;
	}