Nearest Marker

My last part and then I dissapear 😀
( Of course in the end I’ll show you the project and give you georgian translation 🙂 )

Here is my code ( I know it’s a little bit terrible but still, it works)

/*
* Center maps on user location when available.
*/
// An Example Google V3 customization

GeoMashup.addAction( 'loadedMap', function( properties, mxn ) {
	var pointerz;
	var geomarker;
	var start, end;
	var directionsDisplay;
	var siberia = new google.maps.LatLng(60, 105);
	var newyork = new google.maps.LatLng(40.69847032728747, -73.9514422416687);
	var browserSupportFlag =  new Boolean();

	if ( 'global' != properties.map_content ) {
		// Don'ts center non-global maps on user
		return;
	}
	var google_map = mxn.getMap();

	var directionsService = new google.maps.DirectionsService();
	directionsDisplay = new google.maps.DirectionsRenderer();
	directionsDisplay.setMap(google_map);

	var term45 = window.parent.document.getElementById("term-45").style.display="none";
	var paybox = window.parent.document.getElementById("paybox");
	var maptype = window.parent.document.getElementById("maptype");

	function calcRoute(start, end) {
	  var request = {
	    origin:start,
	    destination:end,
	    travelMode: google.maps.TravelMode.DRIVING
	  };
	  directionsService.route(request, function(result, status) {
	    if (status == google.maps.DirectionsStatus.OK) {
	      directionsDisplay.setDirections(result);
	    }
	  });
	}

	var payboxcount = 1;
    paybox.addEventListener("click", function(){
    	payboxcount++;

		if ( payboxcount % 2 === 0 ) {
			// uncheck other marker categories
			var check = window.parent.document.getElementById("gm-category-check-all");
			//double click check_all if any selected but not all
			if ( $( check ).is( ':checked' ) ) {
				$(check).click();
			} else {
				$(check).click();
				$(check).click();
			}
			$(paybox).addClass('btn-new-maps-selected');
			// Try W3C Geolocation (Preferred)
			if(navigator.geolocation) {
				browserSupportFlag = true;
				navigator.geolocation.getCurrentPosition(function(position) {

				var pointerz = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);

				geomarker = new google.maps.Marker({
					    position: pointerz,
					    map: google_map,
					    title:"პირვეტ ს მარსა!"
					});
					start = pointerz;
					end = "Samgori";
					GeoMashup.showCategory(45);
					// To add the marker to the map, call setMap();
					geomarker.setMap(google_map);
					geomarker.setAnimation(google.maps.Animation.BOUNCE);

					calcRoute(start, end);

				}, function() {
					handleNoGeolocation(browserSupportFlag);
				});
			// Try Google Gears Geolocation
			} else if (google.gears) {
				browserSupportFlag = true;
				var geo = google.gears.factory.create('beta.geolocation');
				geo.getCurrentPosition(function(position) {
					 var pointerz = new google.maps.LatLng(-25.363882, 131.044922);

				geomarker = new google.maps.Marker({
					    position: pointerz,
					    map: google_map,
					    title:"Hello World!"
					});

					GeoMashup.showCategory(45);
					// To add the marker to the map, call setMap();
					geomarker.setMap(google_map);
					geomarker.setAnimation(google.maps.Animation.BOUNCE);
					google_map.setZoom(16)
					google_map.setCenter( pointerz );
				}, function() {
					handleNoGeoLocation(browserSupportFlag);
				});
			// Browser doesn't support Geolocation
			} else {
				browserSupportFlag = false;
				handleNoGeolocation(browserSupportFlag);
			}

			function handleNoGeolocation(errorFlag) {
				if (errorFlag == true) {
					initialLocation = newyork;
				} else {
					initialLocation = siberia;
				}
				map.setCenter(initialLocation);
			}
		} else {
		// DESTROY EVERYTHING I CREATED
			GeoMashup.hideCategory(45);
			geomarker.setMap(null);
			$(paybox).removeClass('btn-new-maps-selected');

		}

	},false);

	var maptypecount = 1;
	maptype.addEventListener("click", function(){
		maptypecount++;
    	$(maptype).toggleClass('btn-new-maps-selected');

		if ( maptypecount % 2 === 0 ) {
			mxn.setMapType( 2 );
		} else {
			mxn.setMapType( 1 );
		}

	},false);
} );

So the only thing I left is to add calculation from var pointerz to some_nearest_marker_from_this_category

I found this:

function rad(x) {return x*Math.PI/180;}
function find_closest_marker( event ) {
    var lat = event.latLng.lat();
    var lng = event.latLng.lng();
    var R = 6371; // radius of earth in km
    var distances = [];
    var closest = -1;
    for( i=0;i<map.markers.length; i++ ) {
        var mlat = map.markers[i].position.lat();
        var mlng = map.markers[i].position.lng();
        var dLat  = rad(mlat - lat);
        var dLong = rad(mlng - lng);
        var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
            Math.cos(rad(lat)) * Math.cos(rad(lat)) * Math.sin(dLong/2) * Math.sin(dLong/2);
        var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
        var d = R * c;
        distances[i] = d;
        if ( closest == -1 || d < distances[closest] ) {
            closest = i;
        }
    }

    alert(map.markers[closest].title);
}

there is map.markers.length, when I try mxn.markers.length it works but now I can’t get it’s longitude and latitude for this function, like mxn.markers[1].getPosition or ANYTHING ))

http://wordpress.org/extend/plugins/geo-mashup/