/***** XML Utility *****/
function getXmlNodeValue(xml, node_name) {
	if (xml.getElementsByTagName(node_name).length > 0) {
		if (xml.getElementsByTagName(node_name)[0].childNodes.length > 0) {
			var value = xml.getElementsByTagName(node_name)[0].childNodes[0].nodeValue;
		} else {
			var value = "";
		}
	} else {
		var value = "";
	}

	return value;
}