Calling Method represented by string
<p>I am being passed a string similar to below.</p>

<pre><code>"Users_Controller.login"
</code></pre>

<p>"Users_Controller" represents the object below.
And "login" a method within it.</p>

<pre><code>var Users_Controller = ( function () {
return{

  login : function(vo, callback)
   {......}

 }
 })();
</code></pre>

<p>Given only the string as a pointer,is it possible call the method?</p>
