title: JavaScript runtime error: Unable to get property 'nodeType' of undefined or null reference
body: <p>I tried running an application with knockoutjs script included with jquery and my own js file that has a ViewModel actual binding to the controls.</p>
  
  <p>I am getting the exception every time i run the application.</p>
  
  <p>Is this the issue in my system, or the Visual Studio? I even tried running the html file alone in the browser, i couldn't see any exceptions but it stopped me from performing all other functionalists that are expected to be done from knockoutjs.</p>
  
  <p>Please help me in this regard</p>
  
  <p>This is my full code</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head&gt;
      &lt;title&gt;&lt;/title&gt;
      &lt;script src="Scripts/jquery-1.7.1.min.js"&gt;&lt;/script&gt;
      &lt;script src="Scripts/knockout-2.2.0.js"&gt;&lt;/script&gt;
  
      &lt;script type="text/javascript"&gt;        // Here's my data model
          debugger;
          function viewModel() {
              this.day = ko.observable('24');
              this.month = ko.observable('02');
              this.year = ko.observable('2012');
  
              this.fullDate = ko.computed(function () {
                  return this.day() + "/" + this.month() + "/" + this.year();
              }, this);
          };
  
          ko.applyBindings(new viewModel());
  
      &lt;/script&gt;
  
  &lt;/head&gt;
  &lt;body&gt;
      &lt;p&gt;Day:
          &lt;input data-bind="value: day" /&gt;&lt;/p&gt;
      &lt;p&gt;Month:
          &lt;input data-bind="value: month" /&gt;&lt;/p&gt;
      &lt;p&gt;Year:
          &lt;input data-bind="value: year" /&gt;&lt;/p&gt;
      &lt;p&gt;The current date is &lt;span data-bind="text: fullDate"&gt;&lt;/span&gt;&lt;/p&gt;
  
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>