treenode.prototype.getXMLAttribute = function(attributeName){
	return this.xmlNode.getAttribute(attributeName);
}

treenode.prototype.alertXMLAttributes = function(){
	var str = '';
	var attrs = this.xmlNode.attributes;
	for (var i = 0; i < attrs.length; i++){
		str += 'attribute:'+attrs[i].nodeName+' value:'+attrs[i].nodeValue+'\n';
	}
	alert(str);
}