/**
* See: http://km0ti0n.blunted.co.uk/mozXPath.xap
*/

function xml_hookMozXPath()
{
	// check for XPath implementation
	if( document.implementation.hasFeature("XPath", "3.0") )
	{
	   // prototying the XMLDocument
	   XMLDocument.prototype.selectNodes = function(cXPathString, xNode)
	   {
	      if( !xNode ) { xNode = this; } 
	      var oNSResolver = this.createNSResolver(this.documentElement)
	      var aItems = this.evaluate(cXPathString, xNode, oNSResolver, 
	                   XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null)
	      var aResult = [];
	      for( var i = 0; i < aItems.snapshotLength; i++)
	      {
	         aResult[i] =  aItems.snapshotItem(i);
	      }
	      return aResult;
	   }
	
	   // prototying the Element
	   Element.prototype.selectNodes = function(cXPathString)
	   {
	      if(this.ownerDocument.selectNodes)
	      {
		     return this.ownerDocument.selectNodes(cXPathString, this);
	      }
	      else{throw "For XML Elements Only";}
	   }
	}
	
	// check for XPath implementation
	if( document.implementation.hasFeature("XPath", "3.0") )
	{
	   // prototying the XMLDocument
	   XMLDocument.prototype.selectSingleNode = function(cXPathString, xNode)
	   {
	      if( !xNode ) { xNode = this; } 
	      var xItems = this.selectNodes(cXPathString, xNode);
	      if( xItems.length > 0 )
	      {
	         return xItems[0];
	      }
	      else
	      {
	         return null;
	      }
	   }
	   
	   // prototying the Element
	   Element.prototype.selectSingleNode = function(cXPathString)
	   {	
	      if(this.ownerDocument.selectSingleNode)
	      {
	         return this.ownerDocument.selectSingleNode(cXPathString, this);
	      }
	      else{throw "For XML Elements Only";}
	   }
	}		
}