What is unobtrusive JavaScript in client-side validation scripts
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/4478795/what-is-unobtrusive-javascript-in-layman-terms">What is Unobtrusive Javascript in layman terms?</a>  </p>
</blockquote>



<p>I refer a <a href="http://msdn.microsoft.com/en-us/library/ms171868.aspx#web" rel="nofollow">site</a> in which they mentioned as follows</p>

<blockquote>
  <p>ASP.NET 4.5 includes the following new features:</p>
  
  <ul>
  <li>Support for unobtrusive JavaScript in client-side validation scripts.</li>
  </ul>
</blockquote>

<p>What does "unobtrusive JavaScript" mean?</p>
