knockoutjs not binding checked

knockoutjs not binding checked to array ie9

by ozzymcduff

HTML

<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.1.0.debug.js"></script>
<div id="test" data-bind="click:function(o,e){
        console.log(e.isDefaultPrevented());
        console.log(3);
    }">
    <ul id="a" data-bind="click:function(o,e){
              console.log(2);
    }">
        <li id="b" data-bind="click:function(o,e){
              console.log(1);
    }">b</li>
        <li id="c">c</li>
        <li id="d">d</li>
    </ul>
</div>

JavaScript

$(function () {
        var viewModel = {}
        ko.applyBindings(viewModel);
});