google maps - open marker infowindow given the coordinates

Question

I am using google maps api v3.

Using javascript, how can i open the infowindow of a marker given it's coordinates?

Answer 1

Here is the Jsfiddle that shows you how to do an "outside" of the map JavaScript interaction w/ the Markers. Yes, you do need to save the markers and it's appropriate InfoWindow within an array so you can access it. I created two random markers and use the coordinates from the array ships.

Here are the HTML and with two generic links where clicking link one would center to maker 1 and popup its infowindow and for marker 2 vise versa:

    <div id='map_canvas'></div>
    <a href='#' onClick="gotoPoint(1);">Click for marker 1</a><br/>
    <a href='#' onClick="gotoPoint(2);">Click for marker 2</a>

Within createMarker i store the created maker along with its associate InfoWindow and push it onto the global scope's marker array. On hover the marker, it'll open its associate infowindow:

function createMarker(lat, lon, html) {
    var newmarker = new google.maps.Marker({
        position: new google.maps.LatLng(lat, lon),
        map: map,
        title: html
    });

    newmarker['infowindow'] = new google.maps.InfoWindow({
            content: html
        });

    google.maps.event.addListener(newmarker, 'mouseover', function() {
        this['infowindow'].open(map, this);
    });

    marker.push(newmarker);
}

Here in gotoPoint i simply ass in the marker number as a parameter. I basically set the center of the map to that of marker by using new google.maps.LatLng and use the marker's lat and lng by calling marker[myPoint-1].position.lat(); and marker[myPoint-1].position.lng();, and open its associate InfoWindow with marker[myPoint-1]['infowindow'].open(map, marker[myPoint-1]);:

function gotoPoint(myPoint){
    map.setCenter(new google.maps.LatLng(marker[myPoint-1].position.lat(), marker[myPoint-1].position.lng()));
    marker[myPoint-1]['infowindow'].open(map, marker[myPoint-1]);
}

Let me know if you have any questions about this example.