var map;
var marker; 
function onLoad()  
{
  var icon = new GIcon();
  icon.image = 'http://labs.google.com/ridefinder/images/mm_20_red.png';
  icon.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
  icon.iconSize = new GSize(12, 20); icon.shadowSize = new GSize(22, 20);
  icon.iconAnchor = new GPoint(6, 20); icon.infoWindowAnchor = new GPoint(5, 1); 
  
  map = new GMap(document.getElementById('map'));
  map.addControl(new GSmallMapControl());
  map.centerAndZoom(new GPoint(-66.930000, 10.539999),12);          
  map.setMapType(G_HYBRID_TYPE);

  marker = new GMarker(new GPoint(-66.930000, 10.539999), icon);
  map.addOverlay(marker);

  GEvent.addListener(map, 'click', function(overlay, point) {
  	 document.getElementById("lat").value  = Math.round(100000*point.y)/100000;
	 document.getElementById("lon").value = Math.round(100000*point.x)/100000;
	 map.removeOverlay(marker);
	 marker = new GMarker(point, icon);
	 map.addOverlay(marker);
  });
}