function getXmlChildren( xml, id ) {
	if( !xml )
		return null;
	xml = xml.getElementsByTagName(id);
	if( !xml || !xml[0] )
		return null;
	return xml;
}

function getXmlData( xml, id ) {
	if( !xml )
		return null;
	var txt = xml.getElementsByTagName(id);
	if( !txt || !txt[0] )
		return null;
	if( !txt[0].firstChild )
		return null;
	return txt[0].firstChild.data;
}