gistfile1.js

    body.on('taskAdd', function(event, story) {
        jQuery.get('/Task/add', {projectId: story.projectId(), storyId: story.id()}, function(content) {
            var title = "Add new task to story '" + ko.toJS(story.title()) + "'";
            var buttons = [
                {
                    label: "Save",
                    class: "btn-primary pull-right",
                    callback: function () {
                        var form = jQuery('#formTaskNew');
                        var formItems = form.serializeJSON();

                        // Validate current form items and try to create new task
                        if (validateForm(formItems)) {
                            jQuery.ajax({
                                type: 'POST',
                                url: "/task/",
                                data: formItems,
                                dataType: 'json'
                            })
                            .done(function(/** models.rest.task */task) {
                                makeMessage("Task created successfully.", "success", {});

                                // Add new task to current story first phase tasks
                                story.phases()[0].tasks.push(new Task(task));

                                modal.modal('hide');
                            })
                            .fail(function(jqXhr, textStatus, error) {
                                handleAjaxError(jqXhr, textStatus, error);
                            });
                        }

                        return false;
                    }
                }
            ];

            // Open bootbox modal
            var modal = openBootboxDialog(title, content, buttons);

            // Make form init when dialog is opened.
            modal.on('shown', function() {
                initTaskForm(modal, false);
            });
        })
        .fail(function(jqXhr, textStatus, error) {
            handleAjaxError(jqXhr, textStatus, error);
        });
    });