Knockoutjs.com - Simple list example

http://knockoutjs.com/examples/simpleList.html

HTML

<script src="http://knockoutjs.com/downloads/knockout-3.0.0.js"></script>
<input type="checkbox" id="thisFails" data-bind="click: $root.Fails" />
<label for="thisFails">This Fails</label>

JavaScript

var SimpleListModel = function() {
    
        this.Fails = function() {
         alert('arse');
         $('#thisFails').attr('checked', false);
    }

    
};
 
ko.applyBindings(new SimpleListModel());