title: knockout.js and disabling anchor tag
body: <p>How can I disable and enable an anchor tag with this custom binding.  It works great with input elements but the anchor tag just changes the CSS, not the disabling.</p>
  
  <pre><code>&lt;a href="link" data-bind="myDisabled: !enabled()"/&gt;
  
  ko.bindingHandlers.myDisabled = {
      update: function(element, valueAccessor) {
          var value = ko.utils.unwrapObservable(valueAccessor());
          ko.bindingHandlers.css.update(element, function() {return { disabled: value }; });
          ko.bindingHandlers.disable.update(element, valueAccessor);
      }
  };
  </code></pre>