Am using AJAX code whereby I handle errors form the backend code.. All is working well except that I want to alert the errors individually to the user in a numbered list

**Expected Output**

```
1. Please insert a valid phone number
2. Please insert your email
3. Please insert a valid passport number 

```

**AJAX code handling errors**

```
error: function(data) {
                //Unblock the spinner
                $.unblockUI();
                var errors = '';
                for(datos in data.responseJSON){
                    errors += data.responseJSON[datos] + '<br>';
                }
                //Alert each error individually
                alert(errors);
            }

```