layer.on({
            mouseover: function (e) {
                L.popup().setLatLng(e.latlng)
                .setContent("Test")
                .openOn(map);
            },
            click: function () {
                alert("Click");
                map.fire("click", e);
            }
        });

option.pointToLayer = function (feature, latlng) {
         var marker = L.marker(latlng);
                var icon = L.icon({
        iconUrl: 'Image/InvestmentIcons/environmentalflow.png',
        iconSize: [12, 12], // size of the icon
    });

                    marker.options.icon = icon;
                    return marker;
                }