var point = new GLatLng(12.182634, 99.849243);
var markers = new GMarker(point,{draggable: false});
GEvent.addListener(markers, "click", function()
{
var myHtml = "ทดสอบ<br />";
myHtml += "<a href='http:/\/\www.google.co.th'>http:/\/\www.google.co.th</a>";
map.openInfoWindowHtml(point, myHtml);
map.setCenter(point);
});
map.addOverlay(markers);