söyle birşey buldum.

var formHasChanged = false;

$(document).on('change', 'form.confirm-navigation-form input, form.confirm-navigation-form select, form.confirm-navigation-form textarea', function (e) {
formHasChanged = true;
});

$(document).ready(function () {
window.function (e) {
if (formHasChanged) {
var message = "You have not saved your changes.", e = e || window.event;
if (e) {
e.returnValue = message;
}
return message;
}
}
});