title: javascript calling a function on window object
body: <p>I have the following code and am wondering how to make the last line work. I addopted a set of api's that current use _view appended as it's namespacing convention and would rather use something like arc.view.$function_name. thx</p>
  
  <pre><code>var arc={};
  arc.view={
    say_hello: function(){
      alert("I want to say hello");
    }
  }
  function say_goodbye(){
    alert("goodbye to you");
  }
  
  arc.view.say_hello(); // works
  window['say_goodbye'](); // works
  // possible to make this work?
  window['arc.view.say_hello']();
  </code></pre>