window.Map = {
 map: undefined,
 ipath : 'img/marker.png',

 init : function() {
  this.map = new OpenLayers.Map({div:"osmap", zoom:12});
  this.map.addLayer(new OpenLayers.Layer.OSM());
  this.marker = new OpenLayers.Layer.Markers();
  this.map.addLayer(this.marker);
  var size = new OpenLayers.Size(21,25);
  var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
  this.icon = new OpenLayers.Icon(this.ipath, size, offset);
 },

 addMarker : function(lon, lat) {
  this.marker.addMarker(new OpenLayers.Marker(this.coords(lon, lat), this.icon.clone()));
  this.map.setCenter(this.coords(lon, lat));
 },

 coords : function (lon, lat) {
  return new OpenLayers.LonLat(lon, lat).transform(
   new OpenLayers.Projection("EPSG:4326"),
   new OpenLayers.Projection("EPSG:900913")
  );
 }
};