var point = new GLatLng (55.950281135383, -3.1788253784179688);
var propertyName3 = "Holyrood";
var marker3 = new GMarker(point,icon_blue);
themap.addOverlay(marker3);
GEvent.addListener(marker3, "click", function() {
marker3.openInfoWindowHtml("Holyrood
- Full Details »
- Availability »");
});