new OpenLayers.Projection("EPSG:900913") new OpenLayers.Projection("EPSG:4326") 'm' 156543.0339 3 19 new OpenLayers.Bounds(-20037508, -20037508, 20037508, 20037508.34) 'TMS' 'Road' 'http://tile.openstreetmap.org/' 'png' osm_getTileURL true