When trying to get geolocation on iPhone the first time - I declined. Every other time I want to get the location (before another reload of the page) I get no response (no error and no success):

navigator.geolocation.getCurrentPosition(
    function (location) {
        ig_location.lat = location.coords.latitude;
        ig_location.lng = location.coords.longitude;
        alert('got it!');
    },
    function(PositionError) {
        alert('failed!' + PositionError.message);
    }
);

Is there a way to notify the user every time I fail to get the location?
(I do not need to use watchPosition...)