var centerLatitude= 47;
   var centerLongitude = 1.8;
   var startZoom=6;

  var map;

function addMarker(lat,lng,desc) {
  var marker = new GMarker(new GLatLng(lat,lng));
  GEvent.addListener(marker,'click',
	function() {
	  marker.openInfoWindowHtml(desc);
	}
	);
	map.addOverlay(marker);
}

	function init() {
	  if (GBrowserIsCompatible()) {

		map = new GMap2(document.getElementById("map"));
		map.addControl(new GSmallMapControl());
		var location = new GLatLng(centerLatitude,centerLongitude);
		map.setCenter(location, startZoom);
		for (id in markers) {
		  addMarker(markers[id].longitude,markers[id].latitude,markers[id].name);
		}
		ad=new GAdsManager(map,'pub-4021391349688523',{channel:"0946487791"}) ;
		ad.enable();
	  }
	}

window.onload = init;
window.onunload = GUnload;