var map = new GMap2(document.getElementById("map"));
var geocoder = new GClientGeocoder();


function showAddress(address,zoom) {
  geocoder.getLatLng(
    address,
    function(point) {
      if (!point) {
        alert(address + " not found");
      } else {
        map.setCenter(point, zoom);
        var marker = new GMarker(point);
        map.addOverlay(marker);
        marker.openInfoWindowHtml(address);
      }
    }
  );
}

function load() {
  if (GBrowserIsCompatible()) {
    map = new GMap2(document.getElementById("map"));
    map.addControl(new GSmallMapControl());
    geocoder = new GClientGeocoder();
    showAddress('chantemerle-lès-grignan, France',11);
    }
}