Close all infowindows in Google Maps API v3

Question

I am busy with a script that will make a google maps canvas on my website, with multiple markers. I want that when you click on a marker, a infowindow opens. I have done tha

Answer 1

infowindow is local variable and window is not available at time of close()

var latlng = new google.maps.LatLng(-34.397, 150.644);
var infowindow = null;

...

google.maps.event.addListener(marker, 'click', function() {
    if (infowindow) {
        infowindow.close();
    }
    infowindow = new google.maps.InfoWindow();
    ...
});
...