function get_lastupdate() {
	
	var url = "get_lastupdate_xml.php";
	var paramList = "";

	//var obj = $('municipality_code');
	//obj.innerHTML = "";
	
	new Ajax.Request(url,
	{
	method: 'get',
	onSuccess: get_lastupdate_data,
	onFailure: showErrMsg,
	parameters: paramList
	});

}

function get_lastupdate_data(data) {
	var response = data.responseXML.getElementsByTagName('Response');
	var item = response[0].getElementsByTagName('Item');
		
	if (item.length < 1) {return;}
	
	var lastupdate_tag = item[0].getElementsByTagName('LASTUPDATE');
	var lastupdate = lastupdate_tag[0].firstChild.nodeValue;

	var obj = $('lastupdate');
	obj.innerHTML = "last update : " + lastupdate;
	
}
function showErrMsg(){
	
}