title: Event for multiple elements with the same class name
body: <p>I have the following <a href="http://jsfiddle.net/Nn85Q/" rel="nofollow">code:</a></p>
  
  <pre><code>var abbrs = document.getElementsByClassName("hover");
  abbrs.onmouseover=function() {
       console.log(this);
  };
  </code></pre>
  
  <p>It should trigger when I hover over an element with the class "hover", but it is not working. 
  What am i doing wrong?</p>