var map = null;
    var geocoder = null;

    function initialize() {
      if (GBrowserIsCompatible()) {
        map = new GMap2(document.getElementById("map_canvas"));
		 map.addControl(new GSmallMapControl());
	          map.addControl(new GMapTypeControl());
	          map.addControl(new GScaleControl());
        map.setCenter(new GLatLng(23.134322, 113.317355), 13);
        geocoder = new GClientGeocoder();
         var address=document.getElementById("address").value;
        
         if (geocoder) {
        geocoder.getLatLng(
          address,
          function(point) {
            if (!point) {
              alert("Not Found: " + address);
            } else {
              map.setCenter(point, 13);
              var marker = new GMarker(point);
              map.addOverlay(marker);
              marker.openInfoWindowHtml("<img src='images/yingbinhotel.jpg'/><br/><font color='red'>"+address+"</font>");
              
            }
          }
        );
      }
      }
    }