Knockout Select usage

HTML

<script src="http://rniemeyer.github.com/KnockMeOut/Scripts/knockout-latest.debug.js"></script>
<select
   data-bind="options: tickets,
          optionsCaption:'choose...',
          optionsText: 'name',
          value: chosenTicket">
</select>

<p data-bind="with: chosenTicket">
   <b data-bind="text: name"></b>
   <b data-bind="text: price"></b>
</p>

JavaScript

window.onload = function() {
    if (window.jQuery) {  
        // jQuery is loaded  
        alert("Yeah!");
    } else {
        // jQuery is not loaded
        alert("Doesn't Work");
    }
}