Markers Not Showing On Google Maps

I'm trying to show markers on my map. but it's not showing them. this is the code I use: var map; var markers = new Array(); function initialize() { var mapOptions = {

Solution 1:

map is a local variable, only visible inside initialize.

Use this instead of map when you set the map-property of the marker:

function addMarker(event) {
    markers.push(event.latLng);

    marker = new google.maps.Marker({
        position: event.latLng,
        map: this
    });
}

Explanation:

the callback will be executed in the scope of the object that triggers the event. Here it is the Maps-instance(because the click-listener has been applied to the map ), this will refer to this object inside the callback.

Solution 2:

markers.push(event.latLng);

Here you're pushing the latlng, not the marker.

markers is an array variable with global scope, whereas marker is a local variable.
In markers array you have to insert each inidividual marker and then process it.

function addMarker(event) {
    var marker = new google.maps.Marker({
        position: event.latLng,
        map: map
    });
    markers.push(marker);
}