function setCenter(){
	var params = "../gmaps/yahoo_geocoding.php?address=" + document.getElementById("input_address").value;
	var xmlhttp = new XMLHttpRequest();
	xmlhttp.open("GET", params, false);
	xmlhttp.send(null);
	var resp = xmlhttp.responseText;
	var ar = resp.match(/approx=(\S+) lat=(\S+) lng=(\S+)/);
	window.map.centerAndZoom(new GPoint(RegExp.$3, RegExp.$2), 8);
}