knockoutjs:值绑定互斥或点击事件

我正在学习knockoutjs教程。我稍微修改了一下，看看会发生什么。因此，我从"使用列表和集合"教程开始。首先，我想用div替换标记（这也不能100%工作，但这不是本文的主题）。然后，我不仅想将表单元格绑定到模型值，还想为它提供一个事件处理程序，比如onClick。这是代码：

HTML:

<h2>Your seat reservations</h2>
<div data-bind="foreach: seats">
     <div style="clear: left; display: table; width: 100%;"  >
          <input data-bind="value: name; click: $parent.onClick;" type="text"/>
     </div>
     <div style="width: 300px; float: left; display: table; width: 100%">
         <select data-bind="options: $root.availableMeals, value: meal, optionsText: 'mealName'; select: $root.onClick"></select>
     </div>
</div>
<button data-bind="click: addSeat">Reserve another seat</button>

JS:

// Class to represent a row in the seat reservations grid
function SeatReservation(name, initialMeal) {
    var self = this;
    self.name = name;
    self.meal = ko.observable(initialMeal);
}
// Overall viewmodel for this screen, along with initial state
function ReservationsViewModel() {
    var self = this;
    // Non-editable catalog data - would come from the server
    self.availableMeals = [
        { mealName: "Standard (sandwich)", price: 0 },
        { mealName: "Premium (lobster)", price: 34.95 },
        { mealName: "Ultimate (whole zebra)", price: 290 }
    ];    
    // Editable data
    self.seats = ko.observableArray([
        new SeatReservation("Steve", self.availableMeals[0]),
        new SeatReservation("Bert", self.availableMeals[0]),
        new SeatReservation("Kai", self.availableMeals[0])
    ]);
    // Operations
    self.addSeat = function() {
        self.seats.push (new SeatReservation ("<Please fill>", self.availableMeals[0]));
    }
    self.onClick = function () { alert ('Lets make love'); }
}
ko.applyBindings(new ReservationsViewModel());

问题是没有正确处理单击事件。使用上面的代码，单击输入元素不会有任何效果。如果我交换事件和值属性的顺序（数据绑定="click:$parent.click；value:name；"而不是上面的代码），click事件会起作用，但数据绑定不会发生（输入保持为空）。我看到了同样的效果，尽管如果数据绑定标记只包含点击，那就不那么令人惊讶了。我做错了什么？我想要输入元素的click事件处理程序和数据绑定。我正在Windows7上测试Firefox。

非常感谢Kai