var icon = new GIcon(G_DEFAULT_ICON);
icon.iconSize = new GSize(20, 34);
icon.shadowSize = new GSize(37, 34);
icon.iconAnchor = new GPoint(10, 34);

icon.image = "http://www.realfoodguide.com/img/market-marker.png";
icon.shadow = "http://www.realfoodguide.com/img/marker-shadow.png";