title: Callbacks() is not a function
body: <pre><code> var foo = function( value ) {
            alert( "foo: " + value );
          };
  
          // Another function to also be added to the list
          var bar = function( value ) {
            alerts( "bar: " + value );
          };
  
          var callbacks = $.Callbacks();
  </code></pre>
  
  <p>When i am trying to run above code in firefox browser it's showing me that $.Callbacks() is not a function.</p>