Passing Value To Server On Click Event

I am using google maps and would like to pass the latlng value back to the server as follows
oogle.maps.event.addListener(map, 'click', function(event) {
alert(event.latLng);
post_to_url('updll.php', {'latlng': event.latLng});
location.reload();
placeMarker(event.latLng);
});
The event.latLng gives me the coordinates and the location.reload() reloads the page, but I need to pass the coordinates in to the server so they can be acted upon by the server before the page reloads.