title: Restrict this regex to "edu", top-level domain
body: <p>I have this regex that checks the validity of an email address</p>
  
  <pre><code>var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
  </code></pre>
  
  <p>I want to tweak it so it ensures the email address entered is an .edu account.</p>
  
  <p>PS - It's not for homework, I swear.</p>