CheckBoxGroupCondition

function posCondition() {

                var c=document.getElementById("id_layanan_pos");
                var e=document.getElementById("id_layanan_pos1");
                var f=document.getElementById("id_layanan_pos2");


                if (f.checked &&
                    !e.checked &&
                    !c.checked) {
                        document.getElementById('form-row-file16').style.display = 'block';
                    }

                if (!f.checked &&
                    e.checked &&
                    !c.checked) {
                        document.getElementById('form-row-file16').style.display = 'none';
                    }

                if (!f.checked &&
                    !e.checked &&
                    c.checked) {
                        document.getElementById('form-row-file16').style.display = 'none';
                    }

                if (f.checked &&
                    e.checked &&
                    !c.checked) {
                        document.getElementById('form-row-file16').style.display = 'block';
                    }

                if (f.checked &&
                    !e.checked &&
                    c.checked) {
                        document.getElementById('form-row-file16').style.display = 'block';
                    }

                if (f.checked &&
                    e.checked &&
                    c.checked) {
                        document.getElementById('form-row-file16').style.display = 'block';
                    }

                    }