function initialize() {
  var myLatlng = new google.maps.LatLng(48,2);
  var myOptions = {
    zoom: 5,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }

  var map = new google.maps.Map(document.getElementById("carte"), myOptions);
  var georssLayer = new google.maps.KmlLayer('http://www.neoprog.eu/kml/concerts.kml');
  georssLayer.setMap(map);
}