title: Associative Arrays/Object - getting values with dot notation
body: <p>I don't really get why this isn't working:</p>
  
  <pre><code>thing = {
  img78:{ exifmanufacturer:"Canon", exifmodel:"Canon EOS 450D", exifexposuretime:"1/125", exiffstop:"71/10", exifiso:"200"},
  img79:{ exifmanufacturer:"Canon", exifmodel:"Canon EOS 550D", exifexposuretime:"1/125", exiffstop:"71/10", exifiso:"100"},
  img80:{ exifmanufacturer:"Canon", exifmodel:"Canon EOS 550D", exifexposuretime:"1/30", exiffstop:"16/1", exifiso:"250"},
  img81:{ exifmanufacturer:"NIKON CORPORATION", exifmodel:"NIKON D700", exifexposuretime:"10/600", exiffstop:"71/10", exifiso:"800"},
  img82:{ exifmanufacturer:"NIKON CORPORATION", exifmodel:"NIKON D700", exifexposuretime:"10/2500", exiffstop:"90/10", exifiso:"800"},
  img83:{ exifmanufacturer:"NIKON CORPORATION", exifmodel:"NIKON D700", exifexposuretime:"10/600", exiffstop:"71/10", exifiso:"800"},
  img77:{ exifmanufacturer:"Canon", exifmodel:"Canon EOS 450D", exifexposuretime:"1/160", exiffstop:"8/1", exifiso:"100"},
  img69:{ exifmanufacturer:"NIKON CORPORATION", exifmodel:"NIKON D700", exifexposuretime:"10/600", exiffstop:"71/10", exifiso:"800"}
  }; 
  
  var imageid = 'img80';
  
  console.log('myVar1: ', thing.img80.exifmodel);
  console.log('myVar2: ', thing.imageid.exifmodel);
  </code></pre>
  
  <p>Outputs:</p>
  
  <pre><code>myVar1: Canon EOS 550D
  thing.imageid is undefined
  </code></pre>
  
  <p>I would have thought it would be the other way round.</p>