title: Unable to get value of the property 'get': object is null or undefined
body: <p>my site www.theprinterdepo.com its a magento oscommerce site
  As you know its open source, I didnt developed it.</p>
  
  <p>It loads perfect in chrome and firefox, but I am receiving this javascript error in internet explorer 9.</p>
  
  <p>Unable to get value of the property 'get': object is null or undefined </p>
  
  <p>I tried to debug and found that the problem is it prototype.js</p>
  
  <p>prototype.js, line 516 character 1</p>
  
  <p>The line where it fails its:</p>
  
  <pre><code>var respondersForEvent=registry.get(eventName);if(Object.isUndefined(respondersForEvent)){respondersForEvent=[];registry.set(eventName,respondersForEvent);}
  if(respondersForEvent.pluck('handler').include(ha
  </code></pre>
  
  <p>Obviously, because this is a library, I dont want to modify it my self.</p>
  
  <p>I am looking for suggestions in what to do in this case based on your experience?</p>