var map = null;
var geocoder = null;


    function showAddress(address,zoomlevel) {
      if (geocoder) {
        geocoder.getLatLng(
          address,
          function(point) {
              map.setCenter(point, zoomlevel);
              var marker = new GMarker(point);
              map.addOverlay(marker);
          }
        );
      }
    }