function CustomMarker(latlng, map) {
    this.latlng_ = latlng;

    // Once the LatLng and text are set, add the overlay to the map.  This will
    // trigger a call to panes_changed which should in turn call draw.
    this.setMap(map);
}

CustomMarker.prototype = new google.maps.OverlayView();

CustomMarker.prototype.draw = function () {
    var me = this;

    // Check if the div has been created.
    var div = this.div_;
    if (!div) {
        // Create a overlay text DIV
        div = this.div_ = document.createElement('DIV');
        // Create the DIV representing our CustomMarker
        div.style.border = "none";
        div.style.position = "absolute";
        div.style.paddingLeft = "0px";
        div.style.cursor = 'pointer';

        var img = document.createElement("img");
        img.src = "http://gmaps-samples.googlecode.com/svn/trunk/markers/circular/bluecirclemarker.png";
        div.appendChild(img);
        google.maps.event.addDomListener(div, "click", function (event) {
            google.maps.event.trigger(me, "click");
        });

        // Then add the overlay to the DOM
        var panes = this.getPanes();
        panes.overlayImage.appendChild(div);
    }

    // Position the overlay 
    var point = this.getProjection().fromLatLngToDivPixel(this.latlng_);
    if (point) {
        div.style.left = point.x + 'px';
        div.style.top = point.y + 'px';
    }
};

CustomMarker.prototype.remove = function () {
    // Check if the overlay was on the map and needs to be removed.
    if (this.div_) {
        this.div_.parentNode.removeChild(this.div_);
        this.div_ = null;
    }
};

CustomMarker.prototype.getPosition = function () {
    return this.latlng_;
};