title: Disable browser back button event in asp.net
body: <p>Can anybody tell me meaning of below code.</p>
  
  <pre><code>&lt;script language="Javascript" type="text/javascript"&gt;
  
      function preventBack() { window.history.forward(); }
      setTimeout("preventBack()", 0);
      window.onunload = function () { null };
  
  &lt;/script&gt; 
  </code></pre>