Re: placing multiple points

Immediately under your present script just add:
var point2 = new GPoint(-4.545239210128784, 50.83020787595885);
var marker2 = new GMarker(point2);
var html2 = "Some other text";
GEvent.addListener(marker, "click", function() {
marker.openInfoWindowHtml(html2);
});
map.addOverlay(marker2);

jjrdk