title: invoking nested array in hash and IE
body: <p>I've got this piece of code where after element's class being retrieved a call to a nested array in hash is made using the 'class' value as a key.
  It works fine in webkit and firefox but the if statement crashes in IE it doesn't recognize the given objects!  </p>
  
  <pre><code>&lt;div class="menu groups"&gt;
  ....
  &lt;/div&gt;
  </code></pre>
  
  <p>js</p>
  
  <pre><code>var menusMaxStatus = {'groups' : [70,false], 'attendees' : [40,false] }
  
  var classes = currMenu.attr('class').substr(5);
  
  if( menusMaxStatus[classes] &amp;&amp;  menusMaxStatus[classes][1]){
      normalizeMenu(classes,currSection);
      return;
  }
  </code></pre>
  
  <p>I'm also using jQuery</p>
  
  <p>Would you show me the proper syntax?</p>
  
  <p>console says</p>
  
  <pre><code>'attr(...)' is null or not an object
  'menusMaxStatus[...]' is null or not an object
  </code></pre>