var geocoder;
var map;
function initialize( div ) {
    geocoder = new google.maps.Geocoder();
    var latlng = new google.maps.LatLng(-34.397, 150.644);
    var myOptions = {
      zoom: 15,
      center: latlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById( div ), myOptions);
}

function codeAddress( address ) {
    if (geocoder) {
        geocoder.geocode( { 'address': address}, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                map.setCenter(results[0].geometry.location);
                     var marker = new google.maps.Marker({
                         map: map, 
                         position: results[0].geometry.location
                          });
            } else {
                 alert("Impossible de localiser " + address);
            }
        });
    }
}