ajax call

 if (document.forms[0].checkValidity()) {
 
                e.preventDefault();
 
                $.ajax({
                    type: "POST",
                    url: Person.SaveUrl,
                    data: ko.toJSON(Person.ViewModel),
                    contentType: 'application/json',
                    async: true,
                    beforeSend: function () {
                        // Display loading image
                    },
                    success: function (result) {
                        // Handle the response here.
                    },
                    complete: function () {
                        // Hide loading image.
                    },
                    error: function (jqXHR, textStatus, errorThrown) {
                        // Handle error.
                    }
                });
 
            }