if( GetBrowserType() == BrowserType.Gecko )
{
    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";
            }
        }
    }

    Element.prototype.__defineSetter__("text",function(sText){
        this.textContent=sText;
        return sText;
        });
    Element.prototype.__defineGetter__("text",function(){
        return this.textContent;
        });
}