地理编码无法使用警报

Question

暂时在这个问题上摸不着头脑，寻找答案却无济于事。任何帮助都会非常感激，因为我对js很新。

以下功能在我的代码中以2个点被调用，具有相同的邮政编码。第一次运行时，它成功（警告'Geocode SUCCESSFUL'），但第二次它什么都不做，没有警报。我知道它正在进入第一个警报“Postcode = SO16 6AB，UK＆amp; sensor = false”两次都会发生。

有什么想法吗？

function geolocatePostcode(postcode, coordinates){
    var geocoder = new google.maps.Geocoder();
    var address = postcode + ', UK&sensor=false';
    alert("Postcode = " + address);
    geocoder.geocode(
            {'address': address},
            function(results, status) {
                if (status == google.maps.GeocoderStatus.OK) {
        alert("Geocode SUCCESSFUL");
                    coordinates([ results[0].geometry.location.lat(), results[0].geometry.location.lng() ]);
                }
                else {
        alert("Geocode was not successful for the following reason: " + status);
                    coordinates(false);
                }
            }
    ); 

}

调用函数（当动作'checkout'时，当动作'更新'时，它会一次调用'更新'）...

        function saveAction(action){
        console.log("SaveAction called!");

            switch(action) {
            case 'add':
            case 'checkout':
                var url = '/properties/add-property';
                console.log("SaveAction 'add' switched!");
                break;
            case 'update' :
                var url = '/properties/edit-property';
                console.log("SaveAction 'update' switched!");
                break;
            case 'continue':
                var url = '/properties/checkout';
                console.log("SaveAction 'checkout' switched!");
                break;
            default:
                console.log("Invalid saveAction() paramter specified in property.js");
            }
            if (action != 'continue'){
                geolocatePostcode(postcode.val(), function(coordinates){
                    if (coordinates[0]) {
                        bValid = true;
                        lat = coordinates[0];
                        lon = coordinates[1];
                        console.log("valid postcode");
                    }
                    else {
                        alert('Your postcode appears to be invalid. Please check the postcode and try again.');
                        console.log("invalid postcode");
                        return false;
                    }